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sciq
sciq_01_07562
What term is used for darwin's idea that in stable geologic and climatic conditions evolution occurred gradually?
[ "tinkering", "canibalism", "elitism", "gradualism" ]
D
When geologic and climatic conditions are stable, evolution may occur gradually. This is how Darwin thought evolution occurred. This model of the timing of evolution is called gradualism .
sciq
sciq_01_07894
Arteries have thinner wall layers and valves and move blood by the action of skeletal what?
[ "marrow", "hormones", "muscle", "collagen bands" ]
C
During the systolic phase of the cardiac cycle, the heart is ________. contracting b. relaxing c. contracting and relaxing d. filling with blood 16. How do arteries differ from veins? a. Arteries have thicker wall layers to accommodate the changes in pressure from the heart. Arteries carry blood. Arteries have thinner ...
ARC-Easy
arc_04_01409
The cones of a jack pine tree require great amounts of heat to release their seeds. When are jack pine tree seeds most likely released?
[ "during a flood", "after a fire", "during a drought", "after a disease" ]
B
null
sciq
sciq_01_05760
What is the center of an earthquake called?
[ "the core", "the epicenter", "the magnitude", "the impact" ]
B
Where an earthquake takes place is described by its focus and epicenter.
ARC-Easy
arc_04_00100
Which human body system attacks viruses and bacteria once they have invaded the body?
[ "circulatory", "endocrine", "digestive", "immune" ]
D
null
sciq
sciq_01_06454
Cations are attracted to anions, which are ions with what charge?
[ "neutral", "positive", "similar", "negative" ]
D
2.2 Chemical Bonds Each moment of life, atoms of oxygen, carbon, hydrogen, and the other elements of the human body are making and breaking chemical bonds. Ions are charged atoms that form when an atom donates or accepts one or more negatively charged electrons. Cations (ions with a positive charge) are attracted to an...
math_qa
mathqa_03_00328
excluding stoppages , the speed of a train is 48 kmph and including stoppages it is 36 kmph . of how many minutes does the train stop per hour ?
[ "16", "17", "15", "18" ]
C
"t = 12 / 48 * 60 = 15 answer : c"
sciq
sciq_01_03336
What does the heat energy affect in the atmosphere?
[ "density and humidity", "winds and weather", "erosion and condensation", "gravity and precipitation" ]
B
How do the differences in energy striking different latitudes affect Earth? The planet is much warmer at the equator than at the poles. In the atmosphere, the differences in heat energy cause winds and weather. On the surface, the differences cause ocean currents. Can you explain how?.
sciq
sciq_01_00828
What is it called when two waves in the same medium pass one another?
[ "synchrony", "interference", "accumulation", "frequency" ]
B
Any two waves in the same medium undergo wave interference as they pass each other. At the location where the two waves collide, the result is essentially a summation of the two waves. In some places, a wave crest from one source will overlap a wave crest from the other source. Since both waves are lifting the medium, ...
math_qa
mathqa_03_04479
a shopkeeper sells 450 metres of cloth for rs . 18000 at a loss of rs . 5 per metre . find his cost price for one metre of cloth ?
[ "12", "27", "29", "45" ]
D
sp per metre = 18000 / 450 = rs . 40 loss per metre = rs . 5 cp per metre = 40 + 5 = rs . 45 . answer : d
ARC-Easy
arc_04_01798
Why can a small fire be put out by placing a heavy blanket over it?
[ "This lowers the temperature.", "This makes the flames smaller.", "This absorbs the burning substance.", "This keeps oxygen from reaching the fire." ]
D
null
math_qa
mathqa_03_03523
a flagstaff 17.5 m high casts a shadow of length 40.25 m . the height of the building , which casts a shadow of length 28.75 m under similar conditions will be
[ "12.5 m", "10 m", "17.5 m", "21.25 m" ]
A
"let the height of the building x metres . less lengthy shadow , less in the height ( direct proportion ) 40.25 : 28.75 : : 17.5 : x 40.25 * x = 28.75 * 17.5 x = ( 28.75 x 17.5 ) / 40.25 x = 12.5 answer is a ."
math_qa
mathqa_03_03021
when the price of an article is reduced by 30 % , the sales increases by 50 % . the percentage change in the total amount of receipts is ?
[ "5 % decrease", "5 % increase", "10 % decrease", "15 % decrease" ]
B
we have , receipts = price x sales therefore , net % change in receipts = ( x + y + xy / 100 ) % = [ - 30 + 50 + ( - 30 x 50 ) / 100 ] % = 5 % increase . answer : b
sciq
sciq_01_02740
The units of time, day and year are based on what?
[ "gravitational waves", "moon phases", "motions of the sun", "motions of earth" ]
D
ARC-Challenge
arc_04_02556
Students made lemonade using the following recipe: 100 grams of lemon juice 100 grams of sugar 1,000 grams of water The students combined the lemon juice, sugar, and water in a container. They stirred the lemonade until all the sugar dissolved. They poured the lemonade into a plastic tray and put the tray in a freezer....
[ "100 grams", "200 grams", "1,000 grams", "1,200 grams" ]
D
null
sciq
sciq_01_01177
What is a wall of rocks or concrete called?
[ "groin", "ankle", "knee", "foot" ]
A
Longshore drift can erode the sediment from a beach. To keep this from happening, people may build a series of groins. A groin ( Figure below ) is wall of rocks or concrete. The structure juts out into the ocean perpendicular to the shore. A groin stops the longshore movement of sand. Sand collects on the up-current si...
ARC-Easy
arc_04_01187
Scientists Stanley Miller and Harold Urey sealed water, methane, ammonia, and hydrogen in a flask, to simulate Earth's early environment. They exposed the chemicals to electric charges to simulate lighting. What did the process produce?
[ "bacteria", "nucleic acids", "viruses", "amino acids" ]
D
null
math_qa
mathqa_03_01160
if 2 ^ ( 2 w ) = 8 ^ ( w − 3 ) , what is the value of w ?
[ "3", "6", "9", "12" ]
C
"2 ^ ( 2 w ) = 8 ^ ( w − 3 ) 2 ^ ( 2 w ) = 2 ^ ( 3 * ( w − 3 ) ) 2 ^ ( 2 w ) = 2 ^ ( 3 w - 9 ) let ' s equate the exponents as the bases are equal . 2 w = 3 w - 9 w = 9 the answer is c ."
openbookqa
obqa_02_01330
A mole can avoid being detected by hawks, owls and other predators by
[ "moving slowly", "setting traps", "traveling beneath soil", "building decoys" ]
C
living underground can be used for hiding from predators
sciq
sciq_01_01591
What is the brightest star in the orion constellation?
[ "sol", "omicron", "rigel", "natel" ]
C
7. You look through a telescope at Rigel. Rigel is the brightest star in the Orion constellation. Rigel is around 800 light years from Earth. What are you looking at when you look through that telescope? What does Rigel look like today?.
math_qa
mathqa_03_02949
the average of runs of a cricket player of 10 innings was 35 . how many runs must he make in his next innings so as to increase his average of runs by 4 ?
[ "76", "79", "85", "87" ]
B
"explanation : average = total runs / no . of innings = 35 so , total = average x no . of innings = 35 x 10 = 350 . now increase in avg = 4 runs . so , new avg = 35 + 4 = 39 runs total runs = new avg x new no . of innings = 39 x 11 = 429 runs made in the 11 th inning = 429 - 350 = 79 answer : b"
math_qa
mathqa_03_03059
when n is divided by 24 , the remainder is 3 . find thee difference between previous remainder and the remainder when 9 n is divided by 7 ?
[ "2", "7", "5", "3" ]
D
"let n = 3 ( leaves a remainder of 3 when divided by 24 ) 9 n = 9 ( 3 ) = 27 , which leaves a remainder of 6 when divided by 7 . difference = 6 - 3 = 3 . answer d"
math_qa
mathqa_03_01462
a company produces 65000 bottles of water everyday . if a case can hold 13 bottles of water . how many cases are required by the company to hold its one day production
[ "2000", "4500", "5000", "8000" ]
C
"number of bottles that can be held in a case = 13 number of cases required to hold 65000 bottles = 65000 / 13 = 5000 cases . so the answer is c = 5000"
sciq
sciq_01_03987
The soil beneath a deciduous forest is called what?
[ "cocklebur", "pedalfer", "forest floor", "trichina" ]
B
The soil beneath a deciduous forest is a pedalfer. These soils are very fertile.
math_qa
mathqa_03_02155
what will be the result of 12 ^ 4 + 3 + 2 ^ 9 + 3 - 8 / 2 ?
[ "58", "14", "145", "69" ]
D
"the multiplication ( e . g . 12 ^ 4 ) and division ( e . g . 8 / 2 ) is done first and then the sum ( e . g . 48 + 3 ) and subtraction ( e . g . 4 - 4 ) , and the answer is 69 , option d ."
medmcqa
medmcqa_05_04101
Which one of the following is characteristic of microfilaria of W. bancrofti?
[ "Cephalic space twice as long as broad", "Excretory pore prominent", "Nuclear column smudged", "Caudal end uniformly tapering to a delicate point, and no terminal nuclei present" ]
D
The features of microfilaria of W. bancrofti are: General appearance: Graceful, sweeping curves. Free cephalic space: As long as broad.   Excretory pore: Not prominent:   Caudal end: Uniformly tapering to a delicate point and no terminal nuclei present.   5. Nuclear column: Nuclei discrete; Important points   Microfila...
math_qa
mathqa_03_01399
the perimeter of a semi circle is 162 cm then the radius is ?
[ "31.5", "28", "98", "37" ]
A
"36 / 7 r = 162 = > r = 31.5 answer : a"
math_qa
mathqa_03_03484
the price of a book is increased from $ 300 to $ 360 . what is the % of increase in its price ?
[ "10 %", "20 %", "35 %", "40 %" ]
B
"explanation : change in the price = rs 360 – rs 300 = rs 60 percentage of increase = change in the price initial price * 100 . percentage increase in price = ( 60 300 ) * 100 = 20 % b"
math_qa
mathqa_03_04930
x starts a business with rs . 35000 . y joins in the business after 3 months with rs . 25000 . what will be the ratio in which they should share the profit at the end of the year ?
[ "28 : 15", "29 : 16", "25 : 23", "14 : 15" ]
A
"explanation : ratio in which they should share the profit = ratio of the investments multiplied by the time period = 35000 * 12 : 25000 * 9 = 35 * 12 : 25 * 9 = 7 * 4 : 5 * 3 = 28 : 15 . answer : option a"
openbookqa
obqa_02_00084
Water in a sealed jar might do what when placed in the freezer?
[ "evaporate", "break it", "melt", "run off" ]
B
when water freezes , that water expands
medmcqa
medmcqa_05_03335
Which of the following investigations is not required in Osteosarcoma?
[ "MRI", "Bone marrow biopsy", "CT chest", "Bone scan" ]
B
A biopsy from the lesion is essential for grading of the tumour but a biopsy from bone marrow is not indicated. Bone scan, CT chest and MR1 femur are impoant staging investigations for osteosarcoma. Ref: Apley's system of ohopaedics and fractures 8th/185; Pediatric and Adolescent Osteosarcoma By Norman Jaffe, Oyvind S....
sciq
sciq_01_10423
Flow of what can introduce alleles that are advantageous or ones that are disadvantageous?
[ "larvae", "genes", "babies", "eggs" ]
B
openbookqa
obqa_02_03110
Desalinating water from the what deals with removing salt?
[ "helps them out", "rain from mountains", "oceanic liquids", "trees watered" ]
C
oceans contains most of earth 's water
medmcqa
medmcqa_05_01970
Ionic exchange in the corneal endothelium depends upon the metabolic rate. Which of the following can block Ionic exchange in corneal endothelium?
[ "Inhibition of anaerobic glycolysis", "Activation of anaerobic glycolysis", "Activation of cAMP phosphodiesterase inhibitors", "Interference with electron chain transpo" ]
A
A i.e. Inhibition of anaerobic glycolysis Endothelium provides a leaky barrier to aqueous humor by allowing molecules & electrolytes of small size (2-3nm) to penetrate through focal tight junctions (maculae occludentes). This barrier function is Ca" dependent. The delicate balance between fluid entering corneal stroma ...
sciq
sciq_01_09404
What are known as the building blocks of proteins?
[ "amino acids", "organism acids", "protein acids", "bases" ]
A
Introduction Since the rediscovery of Mendel’s work in 1900, the definition of the gene has progressed from an abstract unit of heredity to a tangible molecular entity capable of replication, expression, and mutation (Figure 15.1). Genes are composed of DNA and are linearly arranged on chromosomes. Genes specify the se...
openbookqa
obqa_02_03229
The pine farms experience destruction yearly due to
[ "a water bottle", "rubbing two sticks", "abrupt electric discharge", "loose gas cans" ]
C
lightning can cause a forest fire
ARC-Challenge
arc_04_03098
As a glacier melts and retreats, a layer of bedrock is exposed. Which term best describes the process that establishes a community on the bedrock?
[ "disturbance", "succession", "weathering", "stabilization" ]
B
null
openbookqa
obqa_02_03640
Scavengers eat dead what?
[ "fauna", "stars", "meteors", "dreams" ]
A
scavengers eat dead organisms
medmcqa
medmcqa_05_04699
Perforin ?
[ "NK cell", "Cytotoxic T cell", "Plasma cell", "Monocyte" ]
B
Ans. is 'b' i.e., Cytotoxic T cell Cytotoxic T Lymphocyte-Mediated Apoptosis Cytotoxic T lymphocytes (CTLs) recognize foreign antigens presented on the surface of infected host cells. Upon activation, CTLs secrete perforin, a transmembrane pore-forming molecule, which promotes entry of the CTL granule serine proteases ...
math_qa
mathqa_03_02482
a man buys a cycle for rs . 800 and sells it at a loss of 15 % . what is the selling price of the cycle ?
[ "s . 1090", "s . 1160", "s . 680", "s . 520" ]
C
"s . p . = 85 % of rs . 800 = rs . 85 / 100 x 800 = rs . 680 answer : c"
sciq
sciq_01_11438
What is captured by the sticky structure at the top of the style called the stigma?
[ "sunlight", "fungi", "pollen", "precipitation" ]
C
ARC-Easy
arc_04_01730
With a microscope, you see that an object has a cell wall, a chloroplast, and a nucleus. What is being observed?
[ "a plant cell", "an animal cell", "a male organism", "a female organism" ]
A
null
medmcqa
medmcqa_05_00557
In a factory, sickness absenteeism predicts about:-
[ "Relationships between employer and employee", "State of health of workers", "Critical path method", "Power and managerial control" ]
B
Sickness absenteeism is a 'useful index in industry to assess the state of health of workers', and their physical, mental and social well being. 8-10days/ person/year.
sciq
sciq_01_03936
Archaeans produce what kind of gas as a waste product?
[ "methane", "carbon dioxide", "sulfide", "carbon monoxide" ]
A
Many archaeans live in close relationships with other organisms. For example, large numbers live inside animals, including humans. Unlike many bacteria, archaeans don't harm their hosts. None of them is known to cause human disease. Archaeans are more likely to help their hosts. For example, archaeans called methanogen...
sciq
sciq_01_00209
Terminal pods are located at the end of what?
[ "stems", "leaves", "spines", "fruits" ]
A
Mendel investigated seven different characteristics in pea plants. In this chart, cotyledons refer to the tiny leaves inside seeds. Axial pods are located along the stems. Terminal pods are located at the ends of the stems.
sciq
sciq_01_00103
What are the long, thin protein extensions in most prokaryotic cells called?
[ "analyte", "neutrons", "flagellum", "cingulum" ]
C
openbookqa
obqa_02_01407
Places lacking warmth have few what
[ "biological entities", "biological weapons", "cold entities", "astronomical entities" ]
A
cold environments contain few organisms
sciq
sciq_01_02148
The heart and the arteries and veins are associated with what system of the body?
[ "respiration", "metabolism", "digestion", "cardiovascular" ]
D
Cardiovascular System: Arteriosclerosis Compliance allows an artery to expand when blood is pumped through it from the heart, and then to recoil after the surge has passed. This helps promote blood flow. In arteriosclerosis, compliance is reduced, and pressure and resistance within the vessel increase. This is a leadin...
openbookqa
obqa_02_04080
A thing which is renewable and is also a resource is definitely
[ "obtained without fear of using up", "likely to be gone soon", "used up in short order", "made to be extinct" ]
A
renewable resources can be used over again
sciq
sciq_01_07991
What orifice in the body is particularly helpful in both digestion and respiration?
[ "mouth", "nose", "nostril", "anus" ]
A
ARC-Easy
arc_04_00605
A salvage yard contains a mixture of iron, glass, aluminum, and plastic. Which property of iron does the salvage yard take advantage of when separating the iron from the rest of the materials?
[ "magnetic", "electrical", "ductility", "malleability" ]
A
null
sciq
sciq_01_11169
What do you call scientists that study the weather, specifically?
[ "hydrologists", "forecasters", "meteorologists", "geologists" ]
C
Predicting the weather requires a lot of weather data. Technology is used to gather the data and computers are used to analyze the data. Using this information gives meteorologists the best chance of predicting the weather.
openbookqa
obqa_02_02965
Dirt is moved from one part of a forest to another, and travels across a field to get there. The movement is
[ "caused by gusts", "due to clouds", "made by trees", "because of litter" ]
A
soil erosion is when wind move soil from environments
sciq
sciq_01_03369
Over time, what changes solid rock into pieces?
[ "creep", "metamorphosis", "leaching", "weathering" ]
D
Weathering changes solid rock into pieces. These pieces are called sediments. Sediments are described in the chapter Earth's Materials and Crust . Sediments are different sizes of rock particles. Boulders are sediments; so is gravel. At the other end, silt and clay are also sediments. Weathering may also cause the mine...
math_qa
mathqa_03_01152
alok ordered 16 chapatis , 5 plates of rice , 7 plates of mixed vegetable and 6 ice - cream cups . the cost of each chapati is rs . 6 , that of each plate of rice is rs . 45 and that of mixed vegetable is rs . 70 . the amount that alok paid the cashier was rs . 1021 . find the cost of each ice - cream cup ?
[ "35", "66", "77", "99" ]
A
"let the cost of each ice - cream cup be rs . x 16 ( 6 ) + 5 ( 45 ) + 7 ( 70 ) + 6 ( x ) = 1021 96 + 225 + 490 + 6 x = 1021 6 x = 210 = > x = 35 . answer : a"
math_qa
mathqa_03_01146
of the 13 employees in a certain department , 1 has an annual salary of 38,000 , 2 have an annual salary of 45,800 each , 2 have an annual salary of 42,500 each , 3 have an annual salary of 40,000 each and 5 have an annual salary of 48,500 each . what is the median annual salary for the 13 employees ?
[ "38,000", "40,000", "42,500", "45,800" ]
D
"median is just the value in the middle when you arrange all values in the ascending order in this question , the 7 th value would be the median ( since there are 13 employees ) 38 , 40 , 40 , 40 , 42.5 , 42.5 , 45.8 so , answer is d ."
sciq
sciq_01_06108
The chytrids the only class in the phylum chytridiomycota is the chytridiomycetes. the chytrids are the simplest and most primitive eumycota, or true this?
[ "acids", "fungi", "organisms", "proteins" ]
B
Chytridiomycota: The Chytrids The only class in the Phylum Chytridiomycota is the Chytridiomycetes. The chytrids are the simplest and most primitive Eumycota, or true fungi. The evolutionary record shows that the first recognizable chytrids appeared during the late preCambrian period, more than 500 million years ago. L...
sciq
sciq_01_09724
What term is used to describe a simple diagram that shows one way energy flows through an ecosystem?
[ "water cycle", "food pyramid", "fuel chain", "food chain" ]
D
A food chain is a simple diagram that shows one way energy flows through an ecosystem. You can see an example of a food chain in Figure below . Producers form the base of all food chains. The consumers that eat producers are called primary consumers. The consumers that eat primary consumers are secondary consumers. Thi...
medmcqa
medmcqa_05_04278
Female with complaints of infertility, HSG showing what?
[ "Unicornuate uterus", "Septate uterus", "Bicornuate uterus", "Uterus didelphys" ]
A
Ans. A. Unicornuate uterusCongenital Mullerian malformations (American Fertility Society Classification System):a. Class I (agenesis, hypoplasia): - Uterus is absent in total agenesis. Partial agenesis is identified as Unicornuate uterus. In hypoplasia, the endometrial cavity is small with reduced intercornual distance...
math_qa
mathqa_03_03819
at present the ratio between the ages of arun and deepak is 5 : 7 . after 6 years , arun ' s age will be 36 years . what is the age of deepak at present ?
[ "35 years", "25 years", "42 years", "39 years" ]
C
"let the present ages of arun and deepak be 5 x years and 7 x years respectively 5 x + 6 = 36 5 x = 30 x = 6 deepak ' s age = 7 x = 42 years answer is c"
sciq
sciq_01_04523
Because several genes, each with more than one allele, contribute to determining height in humans, height is considered what kind of trait?
[ "epigenetic", "polygenic", "maladaptive", "adaptive" ]
B
An example of a human polygenic trait is adult height. Several genes, each with more than one allele, contribute to this trait, so there are many possible adult heights. For example, one adult’s height might be 1.655 m (5.430 feet), and another adult’s height might be 1.656 m (5.433 feet) tall. Adult height ranges from...
medmcqa
medmcqa_05_01666
The marker for determining efficacy of hepatitis B vaccination is:
[ "HBs Ag", "IgM Anti HBc", "IgG Anti HBc", "Anti - HBs Ag" ]
D
Answer is D (Anti-HBs Ag) Anti-HBsAg is the only serological marker to appear after immunization with hepatitis vaccine. Diagnostic interpretation Hbs Ag Anti Hbs Anti HBc Hbc Ag Anti Hbe Immunization with Hbs Ag - + - - - (? Hepatitis B is remote past) (? False positive) Isolated Anti-HBs Ag in serum is seen in immuni...
math_qa
mathqa_03_04259
what profit percent is made by selling an article at a certain price , if by selling at 4 / 5 rd of that price , there would be a loss of 20 % ?
[ "0 %", "29 %", "70 %", "27 %" ]
A
"sp 2 = 4 / 5 sp 1 cp = 100 sp 2 = 80 4 / 5 sp 1 = 80 sp 1 = 100 100 - - - 100 = > 0 % answer : a"
medmcqa
medmcqa_05_04290
Nutrient rich in iron -
[ "Almond", "Pistachio", "Ground nut", "Cashew nut" ]
D
<p> iron The adult human body contains between 3-4 g of iron , of which about 60-70 % is present in blood as circulating iron and the rest as storage iron. Each gram of haemoglobin contain 3.34mg of iron. Functions: 1. Formation of haemoglobin 2. Brain development 3. Regulation of body temperature. 4. Catecholamine met...
math_qa
mathqa_03_00546
at an international conference , “ red ” world countries and “ blue ” world countries are the only participants . the ratio of “ red ” world participants to “ blue ” world participants is 5 : 5 . if one - third of “ red ” world participants are left - handed and two - thirds of “ blue ” world participants are left - ha...
[ "1 / 4", "1 / 8", "1 / 6", "1 / 2" ]
D
"red : blue = 5 : 5 let red = 5 x and blue = 5 x 1 / 3 of red are left handed = > 1 / 3 * 5 x = 5 x / 3 red left handed 2 / 3 of blue are left handed = > 2 / 3 * 5 x = 10 x / 3 blue left handed fraction of participants who are left handed = total left handed / total participants = ( red left handed + blue left handed )...
ARC-Easy
arc_04_00994
Which serve as evidence for a scientific theory?
[ "guesses", "opinions", "arguments", "observations" ]
D
null
openbookqa
obqa_02_04149
If our earth is anything, it is this
[ "alien", "nearest to Pluto", "frozen solid", "mountainous" ]
D
the surface of the Earth contains mountains
ARC-Easy
arc_04_01403
Crows are found throughout many parts of the world. They are black birds with excellent hearing. In the wild they live for six to seven years. Some crows in Japan open hard-shelled nuts by dropping them in front of moving cars. Which of these is a learned behavior?
[ "Having excellent hearing", "Living six to seven years", "Dropping nuts in front of cars", "Having black feathers" ]
C
null
sciq
sciq_01_02746
The motion of molecules in a gas is random in magnitude and direction for individual molecules, but a gas of many molecules has a predictable distribution of what, which is called the maxwell-boltzmann distribution?
[ "molecular size", "molecular speeds", "molecular shape", "molecular rate" ]
B
Distribution of Molecular Speeds The motion of molecules in a gas is random in magnitude and direction for individual molecules, but a gas of many molecules has a predictable distribution of molecular speeds. This distribution is called the Maxwell-Boltzmann distribution, after its originators, who calculated it based ...
openbookqa
obqa_02_01966
A pot of potatoes is left on a stove at medium heat. The person cooking forgets that the potatoes are cooking and they cook for twelve hours. When the person checks on them after half a day,
[ "they are cold", "they are fine", "they are singed", "they are lukewarm" ]
C
if too much heat is transferred to an object then that object may burn
sciq
sciq_01_01555
Different shapes often correlate with different what in cells?
[ "systems", "functions", "types", "enzymes" ]
B
Cells with different functions often have different shapes. The cells pictured in Figure below are just a few examples of the many different shapes that cells may have. Each type of cell in the figure has a shape that helps it do its job. For example, the job of the nerve cell is to carry messages to other cells. The n...
math_qa
mathqa_03_01537
a train speeds past a pole in 15 seconds and a platform 100 m long in 20 seconds . its length is ?
[ "188 m", "876 m", "251 m", "300 m" ]
D
"let the length of the train be x meters and its speed be y m / sec . they , x / y = 15 = > y = x / 15 x + 100 / 20 = x / 15 x = 300 m . answer : d"
math_qa
mathqa_03_02257
how many pieces of 0.35 meteres can be cut from a rod 12.5 meteres long
[ "30", "40", "35", "60" ]
C
"explanation : we need so simple divide 42.5 / 0.85 , = ( 1250 / 35 ) = 35 option c"
ARC-Challenge
arc_04_02377
In the summer, the Arctic fox's fur is dark gray or brown. In the winter, its fur is white. The changes in color enable the fox to
[ "stay dry in the winter.", "hunt for food at all times.", "stay warm in the summer.", "blend in with its surroundings." ]
D
null
math_qa
mathqa_03_01177
two goods trains each 750 m long are running in opposite directions on parallel tracks . their speeds are 45 km / hr and 30 km / hr respectively . find the time taken by the slower train to pass the driver of the faster one ?
[ "72", "45", "48", "51" ]
A
"relative speed = 45 + 30 = 75 km / hr . 75 * 5 / 18 = 125 / 6 m / sec . distance covered = 750 + 750 = 1500 m . required time = 1500 * 6 / 125 = 72 sec . answer : option a"
math_qa
mathqa_03_01099
if 15 % of a class averages 100 % on a test , 50 % of the class averages 78 % on the test , and the remainder of the class averages 63 % on the test , what is the overall class average ? ( round final answer to the nearest percent ) .
[ "76 %", "77 %", "78 %", "79 %" ]
A
"this question is a weighted average question with a series of dependent variables . the remaining portion of the class represents 100 % - 15 % - 50 % = 35 % of the class converting the portions of the class population to decimal weights , we find : class average = 0.15 x 100 + 0.50 x 78 + 0.35 x 63 = 76.05 the class a...
medmcqa
medmcqa_05_02340
How is primary amoebic meningoencephalitis most likely acquired?
[ "Diving or swimming in contaminated water", "Intravenous drug abuse", "Using human excrement as vegetable feilizer", "Eating raw fish or seafood" ]
A
PRIMARY AMOEBIC ENCEPHALITIS :- - Infection spreads post swimming in contaminated water. - Enters Olfactory mucosa in nose Treatment: Miltefosine + Amphotericin B
medmcqa
medmcqa_05_01692
The police brought a person from railway platform. He was talking irrelevant, had dry mouth with hot dry skin, dilated pupils, staggering gait and slurred speech. Most probable diagnosis is: WB 07
[ "Alcoholic intoxication", "Dhatura poisoning", "OPC poisoning", "Aconite poisoning" ]
B
Ans. Dhatura poisoning
math_qa
mathqa_03_00773
addison high school ’ s senior class has 200 boys and 160 girls . if 60 % of the boys and 75 % of the girls attended college , what percentage of the total class that did not attend college ?
[ "33.33", "60", "80", "66.67" ]
D
"number of boys attending the college : 0.60 * 200 = 120 number of girls attending the college : 0.75 * 160 = 120 total attending = 120 + 120 = 240 total people = 200 + 160 = 360 % of people attending = 240 / 360 = 66.67 % . d is the correct answer"
medmcqa
medmcqa_05_01159
Carbamazepine in elderly causes:
[ "Hypernatremia", "Hyponatremia", "Hyperkalemia", "Hypokalemia" ]
B
Carbamazepine Chemically related to imipramine, it was introduced in the 1960s for trigeminal neuralgia; is now a first line antiepileptic drug. Carbamazepine modifies maximal electroshock seizures as well as raises threshold to PTZ and electroshock convulsions. It also inhibits kindling. Though its action on Na+ chann...
medmcqa
medmcqa_05_02592
Permanent carrier for HBV is -
[ "> 6 months", "> 1 month", "> 1 year", "> 2 year" ]
A
<p> The persistent carrier state has been defined as the presence of HBsAg for more than 6 months. Reference:Park&;s textbook of preventive and social medicine,K.Park,23rd edition,page no:213. <\p>
ARC-Challenge
arc_04_02557
A town built a road through a forest. Deer live in the forest on both sides of the road. Which would not help protect deer from the cars on the road?
[ "feeders on the side of the road", "lights along the side of the road", "signs telling drivers to be careful of deer", "bridges that let the deer walk under the road" ]
A
null
medmcqa
medmcqa_05_04313
Anemia in chronic renal failure is due to
[ "Decreased erythropoietin production", "Iron deficiency", "Hypoplastic bone marrow", "Decreased folate levels" ]
A
Ref Harrison 19 th ed pg 630 The anemia is primarily due to a failure of EPO production by the diseased kidney and a reduction in red cell survival. In ceain forms of acute renal failure, the correlation between the anemia and renal function is weaker. Patients with the hemolytic-uremic syndrome increase eryth- ropoies...
medmcqa
medmcqa_05_01215
Good prognostic factor in schizophrenia:
[ "Insidious onset", "Positive symptoms", "Disorganized subtype", "Absence of depression" ]
B
Ans: B (Positive symptoms) Ref: A Short Textbook of Psychiatry by Niraj Ahuja, 7th edition. 201L Jay pee, Page 62 Explanation: (See table below) Prognostic Factors in Schizophrenia Sl no Good prognostic factors Poor prognostic factors 1 Acute or abrupt onset Insidious onset 2 Onset >35 years (Late Onset) Onset < 20 yea...
medmcqa
medmcqa_05_01979
Which set of fatty acids is most effective increasing the cholesterol levels?
[ "Linoleic and linolenic", "Myristic and palmitic", "Butyric and stearic", "Oleic and palmitic" ]
B
Lauric (12:0), myristic (14:0), and palmitic (16:0) acids raise cholesterol levels and are found primarily in animal fat and dairy products. Palmitic acid, the fatty acid that most effectively raises serum cholesterol levels, is also the major fatty acid found in palm and coconut oils. Stearic acid and fatty acids that...
sciq
sciq_01_06623
What characteristic of birds is related to the food they eat?
[ "feet", "feathers", "tail", "beak" ]
D
The size and shape of the beak is related to the food the bird eats and can vary greatly among different birds. Parrots have down-curved, hooked bills, which are well-adapted for cracking seeds and nuts ( Figure below ). Hummingbirds, on the other hand, have long, thin, pointed bills, which are adapted for getting the ...
sciq
sciq_01_10394
What is the process of generating electric current with a magnetic field?
[ "mechanical induction", "electromagnetic induction", "electromagnetic ordination", "magnetic induction" ]
B
Electromagnetic induction is the process of generating electric current with a magnetic field. It occurs whenever a magnetic field and an electric conductor move relative to one another so the conductor crosses lines of force in the magnetic field.
math_qa
mathqa_03_00738
what is ( 21 ^ 7 + 21 ) / 21 ?
[ "82216043", "83786095", "84316108", "85766122" ]
D
( 21 ^ 7 + 21 ) / 21 = 21 * ( 21 ^ 6 + 1 ) / 21 = 21 ^ 6 + 1 clearly this is a number which ends with a 2 in the units place . the answer is d .
openbookqa
obqa_02_00558
Some animals build a structure called a house for their own species to live in. This animal is a
[ "rodent", "reptile", "carnivore", "primate" ]
D
some humans live in houses
sciq
sciq_01_11151
How do you add two dimensional vectors?
[ "geometrically", "graphically", "topologically", "linearly" ]
A
Vectors that are in two dimensions are added geometrically.
openbookqa
obqa_02_03078
Fogged up glass on a store window is a stage in the
[ "food chain", "water cycle", "life cycle", "lunar cycle" ]
B
condensation is a stage in the water cycle process
sciq
sciq_01_08772
What is a waste product from fossil fuel burning?
[ "oxidation", "smog", "co2 emissions", "hydrogen gas" ]
C
People themselves are also affected by the large size of the human population. Some people have a lot; some have very little. Many people refer to the abundance of luxury items in some people’s lives as over-consumption . People in developed nations use 32 times more resources than people in the developing countries of...
medmcqa
medmcqa_05_00121
A 20-year-old female presents with excess facial hair and oligomenorrhea, increased levels of free testosterone, and normal ovaries on USG. Most likely diagnosis is:
[ "PCOD", "Adrenal hyperplasia", "Idiopathic hirsutism", "Testosterone-secreting tumor" ]
A
Ans. A. PCODa. PCOS/PCOD is a disorder of chronically abnormal ovarian function (oligo/anovulation) and hyperandrogenism frequently a/w hyperinsulinemia and insulin resistance, resulting in menstrual irregularity, infertility, and hirsutism.b. Rotterdam 2003 criteria for diagnosis of PCOS/PCOD:c. At least 2 of 3 should...
openbookqa
obqa_02_02569
Which of the following would be the most impactful to an ecosystem?
[ "an 8.1 earthquake", "a tree falling", "a light rainfall", "a minor snowstorm" ]
A
natural events usually cause changes to Earth 's surface
ARC-Easy
arc_04_00150
In any physical or chemical process, what two quantities are always conserved?
[ "matter and total energy", "light and acoustic energy", "density and thermal energy", "gravity and potential energy" ]
A
null
sciq
sciq_01_04912
What is the basic chemical building block of matter; it is the simplest chemical substance?
[ "helium", "atoms", "hydrogen", "element" ]
D
An element is the basic chemical building block of matter; it is the simplest chemical substance.
ARC-Challenge
arc_04_02555
When two unequal forces act in opposite directions on a moving object, the object will
[ "absorb the forces.", "come to an immediate stop.", "continue to move in the same direction.", "move in the same direction as the larger force." ]
D
null
math_qa
mathqa_03_00559
the manager at a health foods store mixes a unique superfruit juice cocktail that costs $ 1399.45 per litre to make . the cocktail includes mixed fruit juice and a ç ai berry juice , which cost $ 262.85 per litre and $ 3104.35 per litre , respectively . the manager has already opened 36 litres of the mixed fruit juice ...
[ "17 litres", "24 litres", "11 litres", "07 litres" ]
B
"262.85 ( 36 ) + 3 , 104.35 x = 1 , 399.45 ( 36 + x ) solve the equation . 262.85 ( 36 ) + 3 , 104.35 x = 1 , 399.45 ( 36 + x ) 9 , 462.6 + 3 , 104.35 x = 50 , 380.2 + 1 , 399.45 x 9 , 462.6 + 1 , 704.9 x = 50 , 380.2 1 , 704.9 x = 40 , 917.6 x = 24 answer is b ."
sciq
sciq_01_05386
Which ancient fish has just two living species and is at risk of extinction?
[ "coelacanths", "squids", "hominids", "latimeria" ]
A
Coelacanths are ancient fish with just two living species. They are at risk of extinction because of their very small numbers.
sciq
sciq_01_04045
The electrolysis of what substance produces hydrogen and oxygen gases
[ "water", "cholesterol", "hydrocarbon", "carbon dioxide" ]
A
The electrolysis of water produces hydrogen and oxygen gases. The electrolytic cell consists of a pair of platinum electrodes immersed in water containing a small amount of an electrolyte, such as H 2 SO 4 . The electrolyte is necessary because pure water does not contain enough ions to effectively conduct a current. A...