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7.76k
sciq
sciq_01_01514
Groupings of related organs in the human body are referred to as "organ" what?
[ "bodies", "systems", "conditions", "functions" ]
B
Human organ systems work together to carry out many of their functions. The skeletal and muscular systems are no exception.
sciq
sciq_01_10530
In mammals, what layer protects the egg?
[ "zona pellucida", "Germinal Disc", "Choloza", "Albumen" ]
A
Early Embryonic Development Fertilization is the process in which gametes (an egg and sperm) fuse to form a zygote (Figure 18.8). To ensure that the offspring has only one complete diploid set of chromosomes, only one sperm must fuse with one egg. In mammals, a layer called the zona pellucida protects the egg. At the t...
sciq
sciq_01_04203
Who is called the father of genetics?
[ "Vincent van Gogh", "Nostradamus", "raphael", "mendel" ]
D
People have long known that the characteristics of living things are similar in parents and their offspring. Whether it’s the flower color in pea plants or nose shape in people, it is obvious that offspring resemble their parents. However, it wasn’t until the experiments of Gregor Mendel that scientists understood how ...
openbookqa
obqa_02_02386
A boy is waiting to see a full moon. He notes that the full moon is tonight, and looks at it. If he wants to see another, he must wait
[ "a week", "a day", "a fortnight", "a month" ]
D
each of the moon 's phases usually occurs once per month
math_qa
mathqa_03_03910
when 1 / 10 percent of 7,000 is subtracted from 1 / 10 of 7,000 , the difference is
[ "0", "50", "450", "693" ]
D
we can break this problem into two parts : 1 ) what is 1 / 10 percent of 7,000 ? 2 ) what is 1 / 10 of 7,000 ? to calculate 1 / 10 percent of 7,000 we must first remember to divide 1 / 10 by 100 . so we have : ( 1 / 10 ) / ( 100 ) to divide a number by 100 means to multiply it by 1 / 100 , so we have : 1 / 10 x 1 / 100...
sciq
sciq_01_11124
The umbilical cord connects the fetus to what structure?
[ "cell", "Ovaries", "uterus", "placenta" ]
D
The fetus is connected to the placenta through the umbilical cord. This is a long tube that contains two arteries and a vein. Blood from the fetus enters the placenta through the umbilical arteries. It exchanges gases and other substances with the mother’s blood. Then it travels back to the fetus through the umbilical ...
sciq
sciq_01_08831
What is the name of the "point" that refers to the temperature at which water vapor condenses?
[ "water point", "melting point", "brine point", "dew point" ]
D
You’ve probably noticed dew on the grass on a summer morning. Why does dew form? Remember that the land heats up and cools down fairly readily. So when night comes, the land cools. Air that was warm and humid in the daytime also cools over night. As the air cools, it can hold less water vapor. Some of the water vapor c...
medmcqa
medmcqa_05_03685
A 10-year old child presented with severe sore throat and a grey pseudomembrane over pharynx and tonsils. The organism causing this infection is most likely:
[ "A gram positive bacillus", "A gram negative bacillus", "A catalase-positive gram positive coccus that grows in clusters", "A single-stranded positive sense RNA virus" ]
A
Ans. a. A gram positive bacillus (Ref: Harrison 19/e p978, 18/e p1189-1190: Ananthanarayan 9/e p239)A 10-year old child presented with severe sore throat and a grey pseudomembrane over pharynx and tonsils. The clinical features are strongly suggestive of a diagnosis of diphtheria, caused by Corynebacterium diphtheria, ...
openbookqa
obqa_02_02370
If blue whales have trouble finding any mates
[ "they could become overpopulated", "their population could drop to the sum of negative two and two", "they could all become sharks", "they could mate with killer whales" ]
B
if all members of a species cannot produce offspring then that species will likely become extinct
math_qa
mathqa_03_02526
the grade point average of one third of the classroom is 60 ; the grade point average of the rest is 66 . what is the grade point average of the whole class ?
[ "55", "56", "64", "65" ]
C
"let n = total students in class total points for 1 / 3 class = 60 n / 3 = 20 n total points for 2 / 3 class = 66 * 2 n / 3 = 44 n total points for whole class = 20 n + 44 n = 64 n 64 n total class points / n total students = 64 grade point average for total class answer : c"
openbookqa
obqa_02_01273
A system of tubes that relocates water and nutrients around in order to make most use of them can be found in
[ "a lily", "a door", "a table", "a rock" ]
A
a plant stem contains a system of tubes for transporting water and nutrients to other parts of the plant
sciq
sciq_01_07246
The main functions of epithelia are protection from the environment, coverage, secretion and excretion, absorption, and this?
[ "accumulation", "diffusion", "absorption", "filtration" ]
D
4.2 Epithelial Tissue In epithelial tissue, cells are closely packed with little or no extracellular matrix except for the basal lamina that separates the epithelium from underlying tissue. The main functions of epithelia are protection from the environment, coverage, secretion and excretion, absorption, and filtration...
sciq
sciq_01_04382
When oxygen is not bound to heme and the partial pressure of oxygen is low, hemoglobin readily binds to what?
[ "carbon dioxide", "iron", "sulfur", "carbon" ]
A
to within the alveoli. As a result, carbon dioxide dissociates readily from hemoglobin and diffuses across the respiratory membrane into the air. In addition to the partial pressure of carbon dioxide, the oxygen saturation of hemoglobin and the partial pressure of oxygen in the blood also influence the affinity of hemo...
math_qa
mathqa_03_02469
a clothing store purchased a pair of pants for $ 81 and was selling it at a price that equaled the purchase price of the pants plus a markup that was 25 percent of the selling price . after some time a clothing store owner decided to decrease the selling price by 20 percent . what was the clothing store ' s gross profi...
[ "$ 14", "$ 5.4", "$ 4.4", "$ 1.2" ]
B
"sale price ( sp ) = 81 + markup ( mp ) - - > mp = sp - 81 and given mp = sp / 4 ( 25 % is 1 / 4 th ) so sp / 4 = sp - 81 3 sp / 4 = 81 sp = 108 now a discount of 20 % is given so new sp is . 8 * 108 = 86.4 profit = 86.4 - 81 = 5.4 $ answer is b"
sciq
sciq_01_08087
What is the name for electrons closer to the nucleus that do not participate in bonding?
[ "radical electrons", "surface electrons", "core electrons", "odd electrons" ]
C
Core electrons are the electrons that are closer to the nucleus and therefore do not participate in bonding.
openbookqa
obqa_02_02252
Which of these animals might seek out the same type of food that a rabbit would?
[ "a lion", "a cow", "a wolf", "a preying mantis" ]
B
rabbits eat plants
sciq
sciq_01_09310
Stomata are special pores that allow gasses to enter and exit what?
[ "the skin", "the soil", "the leaf", "the flower" ]
C
Stomata are special pores that allow gasses to enter and exit the leaf.
math_qa
mathqa_03_03540
cereal a is 11 % sugar by weight , whereas healthier but less delicious cereal b is 2 % sugar by weight . to make a delicious and healthy mixture that is 4 % sugar , what should be the ratio of cereal a to cereal b , by weight ?
[ "2 : 5", "1 : 3", "2 : 7", "3 : 4" ]
C
"2 % is 2 % - points below 4 % and 11 % is 7 % - points above 4 % . the ratio of a : b should be 2 : 7 . the answer is c ."
sciq
sciq_01_00637
What receives blood in the heart?
[ "the atria", "chamber", "ventricle", "the epidermis" ]
A
The atria receive blood and the ventricles pump blood out of the heart.
ARC-Challenge
arc_04_02541
How many atoms are in one formula unit of magnesium hydroxide, Mg(OH)_{2}?
[ "6", "5", "4", "3" ]
B
null
sciq
sciq_01_02311
What term is used to describe birds that mate for an entire season or even stay paired for their entire life?
[ "asexual", "monogamous", "polygamous", "homogeneous" ]
B
These birds are pairing up so that they can produce offspring. Many birds are monogamous , keeping the same mate for an entire season. In some species, they even stay paired for their entire life.
medmcqa
medmcqa_05_01248
Most common intracranial tumour is:
[ "Meningioma", "Glioma", "Cranipharyngioma", "Metastasis" ]
B
Answer is B (Gliomas): Gliomas are the most common primary intracranial neoplasms of the central system.
sciq
sciq_01_05330
Synthesis, decomposition, replacement, and combustion are all types of what reaction?
[ "toxic", "natural", "mineral", "chemical" ]
D
Types of chemical reactions include synthesis, decomposition, replacement, and combustion reactions.
math_qa
mathqa_03_04918
a certain company expects quarterly earnings of $ 0.80 per share of stock , half of which will be distributed as dividends to shareholders while the rest will be used for research and development . if earnings are greater than expected , shareholders will receive an additional $ 0.04 per share for each additional $ 0.1...
[ "$ 92", "$ 312", "$ 104", "$ 120" ]
B
eps actual > eps expected . each gets and additional . 12 per share . thus . 52 * 600 - - > $ 312 answer is b
openbookqa
obqa_02_01382
Sleet is
[ "potentially dangerous", "poison", "hot", "unhealthy" ]
A
sleet is made of ice
math_qa
mathqa_03_02621
150 ml of 30 % sulphuric acid was added to approximate 400 ml of 12 % sulphuric acid solution . find the approximate concentration c of the acid in the mixture ?
[ "1 / 2", "1 / 3", "1 / 4", "1 / 6" ]
D
"do not need any computation 30 % - - - - - - - - - - - 21 % - - - - - - - - - 12 % if volume of both sol . were equal the concentration c would be 21 % = 1 / 5 , but 12 % is more than 3 times only possibility is 1 / 6 d"
openbookqa
obqa_02_00766
Greenhouses work because
[ "windows allow in extra sunlight", "carbon heats up inside", "air retains humidity and warmth", "gasses are trapped in buildings" ]
C
the greenhouse effect is when carbon in the air heats a planet 's atmosphere
sciq
sciq_01_05307
Redox reactions can always be recognized by a change in what number of two of the atoms in the reaction?
[ "oxidation", "fermentation", "oxygen", "precipitation" ]
A
Again, the transfer of an H + ion leaves the oxidation numbers unaffected. In summary, redox reactions can always be recognized by a change in oxidation number of two of the atoms in the reaction. Any reaction in which no oxidation numbers change is not a redox reaction.
medmcqa
medmcqa_05_03492
Hour glass stomach is seen in -
[ "Gastric carcinoma", "Gastric ulcer", "Gastric Lymphoma", "Corrossive Strictures" ]
B
• Hour-glass stomach is caused by cicatricial contraction of a saddle shaped ulcer at the lesser curvature • Tea-pot stomach is caused by longitudinal shortening of gastric ulcer at the lesser curvature of stomach (stomach looks like tea-pot)
sciq
sciq_01_08923
Human population is growing exponentially and humans have increased what normally limiting factor through technology, urbanization, and harnessing the energy of fossil fuels?
[ "zero population growth", "habitat loss", "mass extinction", "carrying capacity" ]
D
19.3 The Human Population Earth’s human population is growing exponentially. Humans have increased their carrying capacity through technology, urbanization, and harnessing the energy of fossil fuels. The age structure of a population allows us to predict population growth. Unchecked human population growth could have d...
medmcqa
medmcqa_05_03565
Catecholamines are synthesized from -
[ "Tyrosine", "Tryptophan", "Glycine", "Glutamate" ]
A
Ans. is 'a' i.e., Tyrosine Amino acidsBiological important compoundTyrosineCatecholamines (epinephrine, norepinephrine, dopamine), thyroxine, triiodothryonine, melanin.(Note: - Phenylalanine is the precursor of tyrosine, thus it can also give rise to all these compounds through tyrosine (phenylalanine - Tyrosine - Cate...
math_qa
mathqa_03_04258
pencils , pens and exercise books in a shop are in the ratio of 14 : 4 : 3 . if there are 140 pencils , the number of exercise books in the shop is :
[ "30", "27", "35", "33" ]
A
explanation : let pencils = 14 x , pens = 4 x & exercise books = 3 x . now , 14 x = 140 hence x = 10 number of exercise books = 3 x = 30 answer : a
sciq
sciq_01_05019
What is the earths crust composed of?
[ "bicellular rock", "sedimentary rock", "metamorphic rock", "igneuos rock" ]
D
Like Earth, the Moon has a distinct crust, mantle, and core. The crust is composed of igneous rock. This rock is rich in the elements oxygen, silicon, magnesium, and aluminum. On the near side, the Moon’s crust is about 30 kilometers thick. On the far side, the crust is about 100 kilometers thick. The mantle is made of...
sciq
sciq_01_00295
An estimated 100 trillion of these live in the gut of an average person?
[ "viruses", "algae", "bacteria", "pathogens" ]
C
It is estimated that 100 trillion bacteria live in the gut. This is more than the human cells that make up you. It has also been estimated that there are more bacteria in your mouth than people on the planet. There are over 7 billion people on the planet.
ARC-Easy
arc_04_00602
Oxygen reacts with iron to produce rust and with hydrogen to produce water. Which statement describes both reactions?
[ "A different mixture is formed in each case.", "A different solution is formed in each case.", "Both a change of state and of elements is involved.", "New molecules are formed but the same elements exist." ]
D
null
sciq
sciq_01_06407
An element symbol without a charge written next to it is assumed to be what?
[ "corroborate atom", "surfactants atom", "dead atom", "uncharged atom" ]
D
Third, there are some exceptions to the previous point. A few elements, all metals, can form more than one possible charge. For example, iron atoms can form 2+ cations or 3+ cations. Cobalt is another element that can form more than one possible charged ion (2+ and 3+), while lead can form 2+ or 4+ cations. Unfortunate...
medmcqa
medmcqa_05_02058
Posterior superior iliac spine is at the level of
[ "L5", "S1", "S2", "S3" ]
C
PSIS line identifies the S2 spinous process most frequently
medmcqa
medmcqa_05_03884
Which of the following is/are not feature(s) of rheumatoid ahritis
[ "Pannus formation in joint", "Osteosclerosis osteoclastic activity in underlying bone", "Erosion of cailage", "Osteophyte" ]
D
Ans. d. OsteophyteThe characteristic histologic features include :Infiltration of synol stroma by dense perivascular inflammatory cells, consisting of B cells and CD4+ helper T, plasma cells and macrophages;Increased vascularity owing to vasodilation and angiogenesis, with superficial hemosiderin deposits;Aggregation o...
math_qa
mathqa_03_00573
23 , 29 , 31 , 37 , 41 , 43 , ( . . . )
[ "53", "48", "59", "47" ]
D
"all are prime numbers in their order , starting from 23 hence , next number is 47 answer is d"
sciq
sciq_01_07691
What is the most prevalent gas in the atmosphere, but not the most vital for life?
[ "carbon dioxide", "oxygen", "nitrogen", "argon" ]
C
Most of the atmosphere is nitrogen, but it doesn't do much. Carbon dioxide and oxygen are the gases in the atmosphere that are needed for life.
sciq
sciq_01_09124
Parthenogenis in komodo dragons is an example of what kind of reproduction, whereby offspring are created from just one parent?
[ "organic reproduction", "benthic reproduction", "natural reproduction", "asexual reproduction" ]
D
No, not all animals have two parents. Sometimes animals can be made from just one parent. This Komodo dragon, for example, only has a mother and reproduces by parthenogenesis. Asexual reproduction is the process of creating offspring from just one parent.
medmcqa
medmcqa_05_01813
A child was brought by his mother complaining nocturnal perianal pruritus and presence of adult worms in the stool. Which of the following is the most common intestinal infection in school-age children worldwide?
[ "Plasmodium vivax", "Enterobius vermicularis", "Entamoeba histolytica", "Strongyloides stercoralis" ]
B
Enterobius vermicularis, the pinworm, is a common cause of intestinal infections worldwide, with maximal prevalence in school-age children. Enterobiasis is transmitted person-to-person ingestion of eggs after contact with the hands or perianal region of an infected individual, food or fomites that have been contaminate...
math_qa
mathqa_03_02092
if the sum of the first n positive integers is s , what is the sum of the first n negative even integers , in terms of s ?
[ "s / 2", "s", "2 s", "2 s + 2" ]
C
answer is c given sum of - 1 - 2 - 3 . . . . . - n = s sum of - 2 , - 4 , - 6 . . . . - 2 n = 2 [ sum ( - 1 - 2 - 3 . . . . n ) ] = 2 s
ARC-Challenge
arc_04_02715
Which of the following characteristics is used when classifying organisms within the plant kingdom?
[ "type of vascular tissue", "use of photosynthesis", "presence of cell walls", "production of oxygen" ]
A
null
ARC-Easy
arc_04_00264
Which characteristic is most common among animals living in a cold climate?
[ "layers of fat", "thick bones", "slow digestion", "large lungs" ]
A
null
sciq
sciq_01_04302
Animal-like protists are called what?
[ "bacteria", "protozoa", "larvae", "genus" ]
B
Animal-like protists are called protozoa. Protozoa are single-celled eukaryotes that share some traits with animals. Like animals, they can move, and they are heterotrophs . That means they eat things outside of themselves instead of producing their own food. Animal-like protists are very small, measuring only about 0....
openbookqa
obqa_02_01079
What might a person use if a transformer blows at 11 pm?
[ "Flashlight", "Television", "Laptop", "Drill" ]
A
a flashlight emits light
openbookqa
obqa_02_01920
Materials that react with other substances to delivery energy, and derived from the remains of living organisms are
[ "excellent for the environment", "a resource being depleted", "never going to run out", "hardly used anywhere by anyone" ]
B
natural gas is a nonrenewable resource
openbookqa
obqa_02_02681
Which of the following is true?
[ "gut flora can make you more healthy", "bacteria is always bad", "bacteria in your brain helps digest food", "gut bacteria always makes you sick" ]
A
bacteria can help digest food in humans
sciq
sciq_01_06861
Green algae and land plants are closely what?
[ "related", "foreign", "different", "unrelated" ]
A
ARC-Challenge
arc_04_03051
Which physical characteristic of Earth is similar to a physical characteristic of the Moon?
[ "its climate", "its great seas", "its atmosphere", "its mountain ranges" ]
D
null
ARC-Easy
arc_04_01429
European starlings are birds that take over the nests of other birds. When they move into an area, starlings reproduce quickly. Taking over the nests of other birds most likely increases the number of starlings by helping them to do what?
[ "attract a better mate", "compete for resources", "migrate during the winter", "blend in with the environment" ]
B
null
medmcqa
medmcqa_05_03506
In &;Hotair oven&; for holding period of one hour, temperature required is -
[ "100o C", "120o C", "140o C", "160 o C" ]
D
Temperature and time: 160 o C for 2 hours (holding time ) is required for sterilization However alternative temperatures and holding time include 170degC for 1 hour and 180degC for 30 minutes Ref: a textbook of Microbiology Dr.C.P.Baveja 4th Edition pg no:30
sciq
sciq_01_02641
What is the type of cancer where bone marrow produces abnormal white blood cells?
[ "anemia", "liver", "leukemia", "kidney" ]
C
Leukemia is a type of cancer in which bone marrow produces abnormal white blood cells. The abnormal cells can’t do their job of fighting infections. Like most cancers, leukemia is thought to be caused by a combination of genetic and environmental factors. It is the most common cancer in children.
sciq
sciq_01_06066
The marine west coast climate gets lots of rain because of what being nearby?
[ "the mountains", "highways", "the ocean", "the Sun" ]
C
The marine west coast climate gets lots of rain from the nearby ocean.
medmcqa
medmcqa_05_00878
Sexual asphyxia is: Maharashtra 08; Gujarat 10
[ "Suicidal death", "Homicidal death", "Natural death", "Accidental death" ]
D
Ans. Accidental death
sciq
sciq_01_09769
What is the term for the measure of the average kinetic energy of the particles in matter?
[ "precipitation", "temperature", "voltage", "friction" ]
B
Temperature is a measure of the average kinetic energy of the particles in matter.
medmcqa
medmcqa_05_03610
Histones are:
[ "Identical to protamine", "Proteins rich in lysine and arginine", "Proteins with high molecular weight", "Insoluble in water and very dilute acids" ]
B
These are proteins containing unusually higher concentration of basic amino acids. Reference: Vasudevan 7th  ed, pg 576
sciq
sciq_01_09584
If a fixed amount of gas maintains a perfectly inversely proportional relationship between volume and pressure, then what else must be constant about the gas?
[ "temperature", "surface tension", "friction", "density" ]
A
For a fixed amount of gas at constant temperature, the volume is inversely proportional to its pressure.
math_qa
mathqa_03_01610
what is the product of all the possible values of x if x ^ 2 - 2 x - 8 ?
[ "– 29", "– 12", "- 8", "29" ]
C
"explanation : = > y = x ^ 2 - 2 x - 8 = > y = ( x + 2 ) ( x - 4 ) = > x = - 2 , y = 4 product x = ( - 2 ) ( 4 ) = - 8 answer option - 8 answer : c"
ARC-Challenge
arc_04_02329
When people exercise, they often feel thirsty and begin to sweat. It is important for people to feel thirsty when exercising because it makes them realize that they should
[ "take a break", "consume liquids", "slow their breathing", "stop to eat something" ]
B
null
medmcqa
medmcqa_05_03418
Which of the following rates is not only an indicator of mortality but also of the living standard of a community ?
[ "IMR", "PNMR", "MMR", "CDR" ]
A
Ans: A (IMR) Ref: Textbook of Preventive and Social Medicine, K. Park, 22nd edition, page 525Explanation:IMR is most important indicator of health status.Latest IMR is 48/1000 live birth in 2011.Infant mortality is largest single age category mortality.Deaths at this age are due to peculiar set of diseases and conditio...
medmcqa
medmcqa_05_02320
Viper snake occurs in -a) Hematotoxicb) Vasculotoxicc) Myotoxicd) Hepatotoxice) Neurotoxic
[ "ab", "ace", "bde", "bc" ]
A
Viper venom is vasculotoxic and contains hemolysin & thromboplastin, which lead to coagulation abnormalities.
sciq
sciq_01_00538
What gets released into the atmosphere when fossil fuels are burned?
[ "carbon dioxide", "hydrogen", "oxygen", "chemical dioxide" ]
A
Using fossil fuels and nuclear energy creates other problems as well. The burning of fossil fuels releases carbon dioxide into the atmosphere. This is one of the major greenhouse gases causing global climate change. Nuclear power creates another set of problems, including the disposal of radioactive waste.
sciq
sciq_01_03795
Like the strings of cello, anything that vibrates produces waves of what?
[ "light", "sound", "energy", "heating" ]
C
A: Like the strings of cello, anything that vibrates produces waves of energy that travel through matter. For example, when you throw a pebble into a pond, waves of energy travel from the pebble through the water in all directions. Like an incandescent light bulb, anything that glows consists of matter that produces li...
math_qa
mathqa_03_00640
what is the cost of leveling the field in the form of parallelogram at the rate of rs . 70 / 10 sq . metre , whose base & perpendicular distance from the other side being 84 m & 24 m respectively ?
[ "s . 2400", "s . 2016", "s . 1400", "s . 3480" ]
B
"area of the parallelogram = length of the base * perpendicular height = 84 * 24 = 2016 m . total cost of levelling = rs . 2016 b"
sciq
sciq_01_05734
An electric stove changes electric current to what form of energy?
[ "kinetic", "thermal", "nuclear", "thermodynamic" ]
B
Electric devices, such as lights and household appliances, change electric current to other forms of energy. For example, an electric stove changes electric current to thermal energy. Other common devices, such as mobile phones and computers, use electric current for another purpose: to encode information. A message en...
medmcqa
medmcqa_05_04995
The response which is graded by an observer on an agree or disagree continuum is based on
[ "Visual analog scale", "Guttman Scale", "Adjective scale", "Likert Scale" ]
D
Likert Scale: Refer to Theory. Visual analog scale (VAS): – VAS is a measurement instrument that tries to measure a characteristic that range across a continuum of values and cannot easily be directly measured (For example, the amount of pain that a patient feels ranges across a continuum from none to an extreme amoun...
math_qa
mathqa_03_02857
a train 50 m long passes a platform 100 m long in 10 seconds . the speed of the train in m / sec is ?
[ "150", "50", "10", "15" ]
D
speed of train = distance covered / time . = ( 50 + 100 ) / 10 = 15 m / sec . answer : d
medmcqa
medmcqa_05_02988
Hemophilia B is due to deficiency of-
[ "Factor VIII", "Factor VII", "Factor IX", "factor X" ]
C
Hemophilia B is due to deficiency of factor 9 and is also called as Christmas disease. Factor 8 deficiency causes Hemophilia A. There are two main types of haemophilia: haemophilia A, which occurs due to low amounts of clotting factor VIII, and haemophilia B, which occurs due to low levels of clotting factor IX. They a...
sciq
sciq_01_04591
What science is the study of the shape and arrangement of cells in tissue?
[ "methodology", "cellology", "histology", "genetics" ]
C
CHAPTER REVIEW 4.1 Types of Tissues The human body contains more than 200 types of cells that can all be classified into four types of tissues: epithelial, connective, muscle, and nervous. Epithelial tissues act as coverings controlling the movement of materials across the surface. Connective tissue integrates the vari...
sciq
sciq_01_00843
Flowers pollinated by what means generally lack brightly colored parts?
[ "larvae", "bees", "wind", "butterflies" ]
C
sciq
sciq_01_02031
What is the tube-like device used to reliably measure lower levels of radiation?
[ "geiger counter", "MRI machine", "Richter scale", "weber counter" ]
A
These devices are not very sensitive to low levels of radiation, but more sensitive devices are also available that reliably measure the frequency of radioactive events. One such device is the Geiger counter. A Geiger counter is a tube filled with an inert gas that will conduct electricity when exposed to charged radia...
sciq
sciq_01_02674
Photoautotrophs use what energy source to self-manufacture their own food?
[ "chlorophyll", "air", "light", "water" ]
C
every organism uses to power its metabolism. In brief, the energy of sunlight is captured and used to energize electrons, which are then stored in the covalent bonds of sugar molecules. How long lasting and stable are those covalent bonds? The energy extracted today by the burning of coal and petroleum products represe...
sciq
sciq_01_02005
Because these components of the endocrine system are transported via blood, they get diluted and are present in low concentrations when they act on their target cells.
[ "hormones", "minerals", "antibodies", "enzymes" ]
A
Endocrine Signaling Signals from distant cells are called endocrine signals, and they originate from endocrine cells. (In the body, many endocrine cells are located in endocrine glands, such as the thyroid gland, the hypothalamus, and the pituitary gland. ) These types of signals usually produce a slower response but h...
sciq
sciq_01_06915
Protists which use their tails to eat are called what?
[ "flagellators", "cycle - feeders", "filter-feeders", "swimmers" ]
C
Some animal-like protists use their "tails" to eat. These protists are called filter-feeders . They acquire nutrients by constantly whipping their tails, called flagellum , back and forth. The whipping of the flagellum creates a current that brings food into the protist.
math_qa
mathqa_03_01880
a man can swim in still water at 5 km / h , but takes twice as long to swim upstream than downstream . the speed of the stream is ?
[ "1.78", "1.667", "1.15", "1.5" ]
B
m = 5 s = x ds = 5 + x us = 5 - x 5 + x = ( 5 - x ) 2 5 + x = 10 - 2 x 3 x = 5 x = 1.667 answer : b
math_qa
mathqa_03_03460
a tank is 25 m long 12 m wide and 6 m deep . the cost of plastering its walls and bottom at 45 paise per sq m is
[ "rs . 234.80", "rs . 334.80", "rs . 434.80", "rs . 534.80" ]
B
"explanation : area to be plastered = [ 2 ( l + b ) ã — h ] + ( l ã — b ) = [ 2 ( 25 + 12 ) ã — 6 ] + ( 25 ã — 12 ) = 744 sq m cost of plastering = 744 ã — ( 45 / 100 ) = rs . 334.80 answer : b"
ARC-Easy
arc_04_00569
Light rays are focused by the lens of a camera through the process of
[ "reflection.", "refraction.", "dispersion.", "diffraction." ]
B
null
sciq
sciq_01_09790
Thylakoid membranes contain molecules of what green pigment used in photosynthesis?
[ "sodium", "chlorophyll", "carbonate", "copper" ]
B
The structure of a chloroplast shows how membrane and molecular architecture helps life processes. A chloroplast consists of thylakoid membranes surrounded by stroma. The thylakoids stack on top of each other, like a stack of pancakes. The thylakoid stacks arrange chlorophyll, accessory pigment molecules, and photosynt...
openbookqa
obqa_02_03149
If a person is lacking a skeletal system they are
[ "thrilled", "muscular", "kind", "spineless" ]
D
skeletal system is made of bones
sciq
sciq_01_06283
The outermost layer of the leaf is the epidermis; it is present on both sides of the leaf and is called the upper and lower epidermis, respectively. botanists call the upper side the adaxial surface (or adaxis) and the lower side this?
[ "dorsal surface", "posterior surface", "anterior surface", "abaxial surface (or abaxis)" ]
D
Leaf Structure and Function The outermost layer of the leaf is the epidermis; it is present on both sides of the leaf and is called the upper and lower epidermis, respectively. Botanists call the upper side the adaxial surface (or adaxis) and the lower side the abaxial surface (or abaxis). The epidermis helps in the re...
ARC-Easy
arc_04_01133
Which of the following animals goes through metamorphosis?
[ "alligator", "frog", "lizard", "turtle" ]
B
null
openbookqa
obqa_02_02575
crops need to be switched on a continual basis why?
[ "the animal habitats", "for more pests", "bees and birds", "more wanted vitamins" ]
D
farming cause nutrients in the soil to decrease
sciq
sciq_01_04317
What do secondary spermatocytes form when completing meiosis?
[ "sporozoans", "semen", "pores", "spermatids" ]
D
Spermatogonia lining the seminiferous tubule undergo mitosis to form primary spermatocytes , which are also diploid. The primary spermatocytes undergo the first meiotic division to form secondary spermatocytes , which are haploid. Spermatocytes make up the next layer of cells inside the seminiferous tubule. Finally, th...
math_qa
mathqa_03_02113
in the fifth grade at parkway elementary school there are 420 students . 312 students are boys and 250 students are playing soccer . 86 % of the students that play soccer are boys . how many girl student are in parkway that is not playing soccer ?
[ "69 .", "73 .", "81", "91" ]
B
total students = 420 boys = 312 , girls = 108 total playing soccer = 250 86 % of 250 = 215 are boys who play soccer . girls who play soccer = 35 . total girls who do not play soccer = 108 - 35 = 73 . correct option : b
openbookqa
obqa_02_02473
How would a runner measure speed?
[ "breaths taken", "water drank", "seconds passed", "people passed" ]
C
seconds are used to measure time
ARC-Easy
arc_04_01142
Genes code for specifically structured
[ "acids.", "lipids.", "sugars.", "proteins." ]
D
null
math_qa
mathqa_03_03676
a miniature roulette wheel is divided into 9 equal sectors , each bearing a distinct integer from 1 to 9 , inclusive . each time the wheel is spun , a ball randomly determines the winning sector by settling in that sector . if the wheel is spun four times , approximately what is the probability that the product of the ...
[ "50 %", "67 %", "80 %", "90 %" ]
D
"the only way to have an odd product is if all 4 integers are odd . p ( odd product ) = 5 / 9 * 5 / 9 * 5 / 9 * 5 / 9 = 625 / 6561 p ( even product ) = 1 - 625 / 6561 = 5936 / 6561 which is about 90 % the answer is d ."
sciq
sciq_01_08447
Transporting blood is the main job of the heart and what?
[ "bones", "blood vessels", "areolas", "lymphatic system" ]
B
Transporting blood is the main job of the heart and blood vessels.
sciq
sciq_01_00188
What does the cell cycle do?
[ "only divide cells", "divide and reproduce cells", "create new cells", "only reproduce cells" ]
B
The cell cycle is a repeating series of events, characterizing the life of a eukaryotic cell.
sciq
sciq_01_08707
An aquifer is an underground layer of rock that is saturated with what?
[ "ocean water", "oil", "wastewater", "groundwater" ]
D
An aquifer is an underground layer of rock that is saturated with groundwater. One of the biggest aquifers in the world is the Ogallala aquifer in the American Midwest.
math_qa
mathqa_03_01158
what positive number , when squared , is equal to the cube of the positive square root of 12 ?
[ "64", "32", "8", "4" ]
D
"let the positive number be x x ^ 2 = ( ( 12 ) ^ ( 1 / 2 ) ) ^ 3 = > x ^ 2 = 4 ^ 3 = 16 = > x = 4 answer d"
medmcqa
medmcqa_05_03686
Most malignant carcinoma of the bladder is ?
[ "Malignant villous tumour", "Solid tumour", "Carcinomatous ulcer", "Adenocarcinoma" ]
B
Ans. is 'b' i.e., Solid tumour Muscle Invasive tumour nearly always solid
medmcqa
medmcqa_05_00807
in census literacy rate is assessed by:
[ "Attended literacy classes for one year", "Ability to write signature", "Ability to read and write", "Attended schooling" ]
C
Ans: C (Ability to read and write) Ref: Textbook of Preventive and Social Medicine, K Park. 22nd edition. page no 44 7Explanation:Census is conducted once in 10 years in India.Literacy rate is assessed those above 7 years ageIn census it was first used in 1991 censusA person who can read and write with understanding in...
openbookqa
obqa_02_01833
A person going home would head
[ "to a cow", "to a moon", "to a jail", "to a duplex" ]
D
some humans live in houses
medmcqa
medmcqa_05_03587
Which of the following is approved oral therapy for Leishmaniasis?
[ "Sodium Stibogluconate", "Miltefosine", "Pentomedine", "Amphoterium B" ]
B
Ans. B. MiltefosineTreatment of visceral leishmaniasisPentavalent antimonyAmphotericin BLiposomal amphotericin BMiltefosinePentamidineParomomycin
math_qa
mathqa_03_02733
the total marks obtained by a student in mathematics and physics is 60 and his score in chemistry is 20 marks more than that in physics . find the average marks scored in mathamatics and chemistry together ?
[ "40", "99", "88", "77" ]
A
"let the marks obtained by the student in mathematics , physics and chemistry be m , p and c respectively . given , m + c = 60 and c - p = 20 m + c / 2 = [ ( m + p ) + ( c - p ) ] / 2 = ( 60 + 20 ) / 2 = 40 . answer : a"
math_qa
mathqa_03_03071
sachin is younger than rahul by 6 years . if the ratio of their ages is 7 : 9 , find the age of sachin
[ "24.58", "14", "15", "24.9" ]
C
"if rahul age is x , then sachin age is x - 6 , so ( x - 6 ) / x = 7 / 9 = > 9 x - 42 = 7 x = > 2 x = 42 = > x = 21 so sachin age is 21 - 6 = 15 answer : c"
math_qa
mathqa_03_01273
timothy leaves home for school , riding his bicycle at a rate of 6 miles per hour . fifteen minutes after he leaves , his mother sees timothy ’ s math homework lying on his bed and immediately leaves home to bring it to him . if his mother drives at 36 miles per hour , how far ( in terms of miles ) must she drive befor...
[ "1 / 3", "9 / 5", "4", "9" ]
B
in 15 mins , timothy travels = 6 / 4 miles . now , let his mother takes x hours to reach him , traveling at 36 mph . so , 36 x = 6 x + 6 / 4 x = 1 / 20 hrs . thus , the distance traveled by his mother to reach = 36 * 1 / 20 = 9 / 5 miles . ans b