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openbookqa
obqa_02_04263
If you place a piece of paper on a hot object it will leave a
[ "damp spot", "a curl", "some ice", "a singe mark" ]
D
if an object is hot then the surfaces of that object are hot
ARC-Easy
arc_04_00330
Manganese has an atomic number of 25 and an atomic mass of 55 amu. How many particles are found in its nucleus?
[ "25", "30", "55", "80" ]
C
null
openbookqa
obqa_02_00373
When a person gets hurt physically, the person feels pain because there are
[ "magic receptors", "electric reactions", "making nervous", "loud nerves" ]
B
nervous system is an electric conductor
math_qa
mathqa_03_00012
in a certain pond , 40 fish were caught , tagged , and returned to the pond . a few days later , 40 fish were caught again , of which 2 were found to have been tagged . if the percent of tagged fish in the second catch approximates the percent of tagged fish in the pond , what ` s the approximate number of fish in the ...
[ "400", "800", "1250", "2500" ]
B
"the percent of tagged fish in the second catch is 2 / 40 * 100 = 5 % . we are told that 5 % approximates the percent of tagged fish in the pond . since there are 40 tagged fish , then we have 0.05 x = 40 - - > x = 800 . answer : b ."
openbookqa
obqa_02_04101
Some animals escape predators by moving how?
[ "slowly", "happily", "briskly", "steadily" ]
C
some animals move quickly to escape predators
sciq
sciq_01_05543
In what state of matter are particles rigidly fixed in space and held tightly to neighboring particles?
[ "energies", "solids", "liquids", "Gases" ]
B
As shown in Figure above , each state of matter looks quite different at the molecular level. In the case of liquids and solids, the distances between particles are negligible relative to the size of each particle; they are essentially in direct contact with one another. In liquids, particles are free to move and excha...
sciq
sciq_01_10531
After infecting a host, what inactive state do some viruses enter?
[ "hibernation", "immunity", "latency", "potency" ]
C
sciq
sciq_01_11476
The intentional release or spread of agents of disease is known as what?
[ "bioterrorism", "pandemic", "disaster", "act of war" ]
A
Bioterrorism is the intentional release or spread of agents of disease. The agents may be viruses, bacteria, or toxins produced by bacteria. The agents may spread through the air, food, or water; or they may come into direct contact with the skin. Two of the best known bioterrorism incidents in the U. S. occurred early...
sciq
sciq_01_10609
The movement of bone away from the midline of the body is called what?
[ "extension", "spring", "flexion", "continuation" ]
A
The movement of bone away from the midline of the body is called ________. circumduction b. extension c. adduction d. abduction.
sciq
sciq_01_04625
Colliding-beam accelerators create matter from what?
[ "minerals", "sound", "magnetism", "energy" ]
D
Conceptual Questions 33.3 Accelerators Create Matter from Energy 1. The total energy in the beam of an accelerator is far greater than the energy of the individual beam particles. Why isn’t this total energy available to create a single extremely massive particle? 2. Synchrotron radiation takes energy from an accelerat...
openbookqa
obqa_02_02490
When soil is disrupted to extreme levels
[ "plants thrive", "environments suffer", "mice breed", "bugs hoard" ]
B
erosion of soil has a negative impact on the environment
ARC-Easy
arc_04_00399
Compared to other stars in our galaxy, which is the best description of our Sun?
[ "larger size, higher temperature", "smaller size, higher temperature", "larger size, average temperature", "average size, average temperature" ]
D
null
sciq
sciq_01_07581
What is the layer of electrons that encircle the nucleus at a distinct energy level called?
[ "electron shell", "molecular shell", "ions shell", "vortex shell" ]
A
The Behavior of Electrons In the human body, atoms do not exist as independent entities. Rather, they are constantly reacting with other atoms to form and to break down more complex substances. To fully understand anatomy and physiology you must grasp how atoms participate in such reactions. The key is understanding th...
sciq
sciq_01_00463
While most mammals give birth to live young, monotremes can do what?
[ "lay eggs", "adopt offspring", "steal eggs", "reproduce asexually" ]
A
Monotremes can lay eggs, but most mammals give birth to live young.
sciq
sciq_01_10672
What genetic unit is formed when the dna double helix wraps around proteins and tightly coils a number of times?
[ "chromosome", "gene", "atom", "neutron" ]
A
(left) The DNA double helix wraps around proteins (2) and tightly coils a number of times to form a chromosome (5). This figure shows the complexity of the coiling process. The red dot shows the location of the centromere, where the microtubules attach during mitosis and meiosis. (right) A representation of a condensed...
sciq
sciq_01_06988
What is the term for the shallow space above the zygomatic arch in a skull?
[ "Medium Fossa", "distinct fossa", "angular fossa", "temporal fossa" ]
D
Figure 7.5 Lateral View of Skull The lateral skull shows the large rounded brain case, zygomatic arch, and the upper and lower jaws. The zygomatic arch is formed jointly by the zygomatic process of the temporal bone and the temporal process of the zygomatic bone. The shallow space above the zygomatic arch is the tempor...
ARC-Challenge
arc_04_02818
Some students used a hot plate to heat 1 L of water from 20°C to the boiling point of water. The students recorded the temperature of the water each minute until it began to boil. Which of the following provides the most appropriate way to represent the data?
[ "a bar graph with temperature on the y-axis and time on the x-axis", "a bar graph with time on the y-axis and temperature on the x-axis", "a line graph with temperature on the y-axis and time on the x-axis", "a line graph with time on the y-axis and temperature on the x-axis" ]
C
null
medmcqa
medmcqa_05_00127
Endometriosis is commonly associated with :
[ "B/L chocolate cyst of ovary", "Adenomyosis", "Fibroid", "Luteal cyst" ]
A
Ans. is ai.e. B/L chocolate cyst of ovary "The ovary is the commonest site and is involved in 30-40% of cases. The lesion is nearly always bilateral. It sometimes appears as multiple burnt match head spots on the surface of the ovary and sometimes as the typical tarry cysts in a disorganised organ surrounded by dense a...
sciq
sciq_01_09219
Most of food's chemical energy ultimately comes from what source?
[ "air", "minerals", "plants", "sunlight" ]
D
Living things must have chemical energy from food to power life processes. Most of the chemical energy in food comes ultimately from the energy in sunlight.
math_qa
mathqa_03_02304
4 men and 6 women finish a job in 8 days , while 3 men and 7 women finish it in 10 days . in how many days will 10 women working together finish it ?
[ "30 days", "40 days", "50 days", "60 days" ]
B
explanation : let 1 man ' s 1 day work = x and 1 woman ' s 1 days work = y . then , 4 x + 6 y = 1 / 8 and 3 x + 7 y = 1 / 10 solving , we get y = 1 / 400 [ means work done by a woman in 1 day ] 10 women 1 day work = 10 / 400 = 1 / 40 10 women will finish the work in 40 days option b
medmcqa
medmcqa_05_03819
Features like hypogonadism, dwarfism, loss of hair, pigmentation and ulcers of skin and decreased immunity are associated with deficiency of:September 2008
[ "Iron", "Zinc", "Iodine", "Copper" ]
B
Ans. B: ZincTrace elements are defined as elements found in tissues in minute amounts. These are believed to be essential for life. In humans:Iron deficiency causes anemiaCobalt is pa of the vitamin B12 molecule, and vitamin B12 deficiency leads to megaloblastic anemiaIodine deficiency causes thyroid disordersZinc defi...
sciq
sciq_01_04034
What in hemoglobin gives red blood cells their red color?
[ "barium", "lead", "calcium", "iron" ]
D
Red blood cells are shaped like flattened disks. There are trillions of red blood cells in your blood. Each red blood cell has millions of molecules of hemoglobin. Hemoglobin is a protein that contains iron. The iron in hemoglobin gives red blood cells their red color. It also explains how hemoglobin carries oxygen. Th...
math_qa
mathqa_03_02444
the average age of 42 students in a group is 16 years . when teacher â € ™ s age is included to it , the average increases by one . what is the teacher â € ™ s age in years ?
[ "31", "56", "41", "59" ]
D
"sol . age of the teacher = ( 43 ã — 17 â € “ 42 ã — 16 ) years = 59 years . answer d"
medmcqa
medmcqa_05_02306
Gerlach tonsil is ?
[ "Palatine tonsil", "Lingual tonsil", "Tubal tonsil", "Nasopharyngeal tonsil" ]
C
Ans. is 'c' i.e., Tubal tonsilGerlach tonsil is a collection of lymphoid nodules near the pharyngeal opening of auditory tube.It is also called as tubal tonsil.Gerlach valve : A fold of mucous membrane at the origin of vermiform appendix, simula ye. It is also known as valve of vermiform appendix or valvula processus v...
sciq
sciq_01_08858
What are the male reproductive cells called?
[ "mucus", "sperm", "ova", "plasma" ]
B
Sperm ( Figure below ), the male reproductive cells, are tiny. In fact, they are the smallest cells in the human body. What do you think a sperm cell looks like? Some people think that it looks like a tadpole. Do you agree?.
ARC-Challenge
arc_04_02402
The interior of Earth is made up of several physically different layers. The solid layer of Earth that moves over a viscous layer is called the
[ "core.", "crust.", "asthenosphere.", "atmosphere." ]
B
null
sciq
sciq_01_10079
Polychaetes make up a large and diverse group. which category do the majority of these worms fall into?
[ "marine", "terrestrial", "carnivorous", "amphibian" ]
A
math_qa
mathqa_03_00001
a card board of 34 * 14 has to be attached to a wooden box and a total of 35 pins are to be used on the each side of the cardbox . find the total number of pins used .
[ "135", "136", "137", "138" ]
B
( 35 * 4 ) - 4 = 136 answer : b
sciq
sciq_01_04162
The cell membrane consists of two adjacent layers of what?
[ "phospholipids", "membranes", "lecithin", "eukaryotes" ]
A
The cell membrane consists of two adjacent layers of phospholipids. The lipid tails of one layer face the lipid tails of the other layer, meeting at the interface of the two layers. The phospholipid heads face outward, one layer exposed to the interior of the cell and one layer exposed to the exterior (Figure 3.3). Bec...
ARC-Challenge
arc_04_02427
The largest body in our solar system is
[ "Earth.", "the Sun.", "Jupiter.", "the Moon." ]
B
null
sciq
sciq_01_10939
What is the process of processing used material into new ones called?
[ "reuse", "recycling", "remake", "renew" ]
B
Now we move on to recycle. Sometimes it may be difficult to understand the differences between reusing and recycling. Recycling involves processing used materials in order to make them suitable for other uses. That usually means taking a used item, breaking it down, and reusing the pieces. Even though recycling require...
medmcqa
medmcqa_05_03179
Kamino bodies are seen in
[ "Lichen planus", "Hailey-Hailey disease", "Lichenoid tissue reaction", "Spitz nevus" ]
D
Kamino bodies are the eosinophilic globules seen in Spitz nevus( it is benign melanocytic nevus, a type of skin lesion, affecting the epidermis and dermis)
openbookqa
obqa_02_01135
what role does some plankton have that is similar to farmer in ohio?
[ "needs food", "produces food", "can get sick", "lives in ocean" ]
B
In the food chain process some types of plankton have the role of producer
sciq
sciq_01_04377
What is another name for flatworms such as tapeworms and flukes?
[ "polychaetes", "trematodes", "epiphytes", "platyhelminthes" ]
D
Platyhelminthes are flatworms such as tapeworms and flukes.
math_qa
mathqa_03_01625
mr . karan borrowed a certain amount at 6 % per annum simple interest for 9 years . after 9 years , he returned rs . 8110 / - . find out the amount that he borrowed .
[ "rs . 4,900", "rs . 5,000", "rs . 5,100", "rs . 5266" ]
D
"explanation : let us assume mr . karan borrowed amount is rs . a . ( the principal ) by formula of simple interest , s . i . = prt / 100 where p = the principal , r = rate of interest as a % , t = time in years s . i . = ( p * 6 * 9 ) / 100 = 54 p / 100 amount = principal + s . i . 8110 = p + ( 54 p / 100 ) 8110 = ( 1...
sciq
sciq_01_05174
Blood leaves the left ventricle via the what?
[ "aorta", "atrium", "capillary", "dorsal chamber" ]
A
medmcqa
medmcqa_05_01319
Morphine is used in the treatment of:-
[ "Hypeension", "Cardiac arrhythmias", "Acute left ventricular failure", "A-V block" ]
C
These are used as analgesic agents. Visceral, dull and constant pain is relieved more effectively than inflammatory pain. Opioids are however contraindicated in biliary colic. Morphine (i.v.) is useful in myocardial infarction as well as in pulmonary edema due to acute left ventricular failure.
sciq
sciq_01_06337
Energy from the sun has a wide range of wavelengths.what is the total range of energy called?
[ "light spectrum", "electromagnetic spectrum", "heat spectrum", "thermal spectrum" ]
B
Energy from the Sun has a wide range of wavelengths. The total range of energy is called the electromagnetic spectrum . You can see it in Figure below .
math_qa
mathqa_03_00938
the ratio of type of pen and type of notebook is 5 : 4 . and in 80 ways one can start writing . tell me the no . of pen and no . of notebook .
[ "6,12", "10,6", "10,8", "8,4" ]
C
let the ratio constant be x . no . of pen = 5 x , no . of notebook = 4 x . total no . of ways of start writing = 5 x * 4 x = 20 ( square of x ) = 80 x = â ˆ š 4 = 2 pen = 10 , notebook = 8 answer c
sciq
sciq_01_09637
Although it is the easiest to observe, what property is not ideal as a sole way to identify minerals?
[ "color", "density", "composition", "temperature" ]
A
Color is probably the easiest property to observe. Unfortunately, you can rarely identify a mineral only by its color. Sometimes, different minerals are the same color. For example, you might find a mineral that is a golden color and think it is gold. But it might actually be pyrite, or “fool's gold,” which is made of ...
openbookqa
obqa_02_03946
If a see through thing is multifaceted, it is most likely
[ "a ball", "an apple", "a silver globe", "a quartz square" ]
D
a quartz is made of six-sided transparent crystals
ARC-Easy
arc_04_01834
While Anna was testing a circuit, she dropped a light bulb. What is the safest thing Anna can do?
[ "get a new bulb to finish the test", "push the broken glass under a table", "tell her teacher that she broke the bulb", "ask her partner to help pick up the broken glass" ]
C
null
medmcqa
medmcqa_05_02924
Modern IOL is made up of –a) Acrylic acidb) PMMAc) PMLd) Silicone) Glass
[ "abc", "abd", "bc", "bde" ]
B
IOL are made of (i) PMIVIA (rigid IOL); (ii) Silicon, acrylic, hydrogel, collamer (foldable IOL).
sciq
sciq_01_04925
The physical sciences can be divided into physics and what other science?
[ "biology", "phsycology", "astrology", "chemistry" ]
D
Physical science, in turn, can be divided into chemistry and physics. Chemistry is the study of matter and energy at the scale of atoms and molecules. For example, the synthetic fibers in the swimmer’s suit were created in labs by chemists. Physics is the study of matter and energy at all scales—from the tiniest partic...
openbookqa
obqa_02_00664
How many lizards live in desert habitats?
[ "all", "some", "fifteen", "none" ]
B
some lizards live in desert habitats
medmcqa
medmcqa_05_03671
Which of the following cell type(s) secretes prostate specific antigen (PSA)?
[ "Benign prostate epithelial cells only", "Malignant prostate epithelial cells only", "Benign and malignant prostate epithelial cells", "Prostate stromal cells" ]
C
Prostate-specific antigen (PSA), a glycoprotein with a MW of 34,000, is a biological marker used in the detection of prostate cancer. It is secreted from prostatic epithelial cells and is responsible for aiding liquefaction of semen. This marker, which is evaluated with a blood test, can be produced by both benign and ...
sciq
sciq_01_09473
What do you call the hard case that surrounds the soft parts of some animals?
[ "exoskeleton", "muscles", "shell", "membrane" ]
A
ARC-Easy
arc_04_01415
In Alaska, there are fewer hours of daylight in the winter than in the summer. Which statement best explains why this difference occurs?
[ "The Sun burns hotter in the summer.", "The Sun moves below the horizon in the summer.", "The Northern Hemisphere is closer to the Sun in the winter.", "The Northern Hemisphere is tilted away from the Sun in the winter." ]
D
null
ARC-Challenge
arc_04_02955
A female opossum can give birth to 5-15 offspring. What increases with a larger litter?
[ "the rate at which they mature", "the number of reliable food sources", "the amount of maternal care per offspring", "the likelihood that some will survive and reproduce" ]
D
null
sciq
sciq_01_08196
What is the most common type of joint in the human body?
[ "dorsal joints", "proximal joints", "movable joints", "transverse joints" ]
C
Movable joints are also the most common type of joint in your body. Your fingers, toes, hips, elbows, and knees all provide examples of movable joints. The surfaces of bones at movable joints are covered with a smooth layer of cartilage. The cartilage reduces friction between the bones. Ligaments often cross a joint, h...
openbookqa
obqa_02_04819
A consequence of creating thousands of notebooks is
[ "longer days", "habitat change", "lush landscapes", "shorter days." ]
B
creating paper requires cutting down trees
sciq
sciq_01_04810
What is found inside the pores of spongy bone?
[ "liquid marrow", "bone marrow", "green marrow", "rupture marrow" ]
B
Bone marrow is a soft connective tissue that produces blood cells. It is found inside the pores of spongy bone.
openbookqa
obqa_02_03283
If food is being digested then it is in the body
[ "under foot", "in the ear", "in the leg", "above the knees" ]
D
the digestive system breaks food into nutrients for the body
math_qa
mathqa_03_03672
how long does a train 165 meters long running at the rate of 72 kmph take to cross a bridge 660 meters in length ?
[ "28", "41.25", "55", "18" ]
B
"t = ( 660 + 165 ) / 72 * 18 / 5 t = 41.25 answer : b"
sciq
sciq_01_03132
What is the force of attraction between fundamental particles called quarks, called.
[ "magnetism", "gravity", "weak nuclear force", "strong nuclear force" ]
D
The strong nuclear force is a force of attraction between fundamental particles called quarks, which have a type of charge called color charge. The strong nuclear force is transferred between quarks by fundamental force-carrying particles called gluons. Both protons and neutrons consist of quarks. The exchange of gluon...
math_qa
mathqa_03_01122
two trains 140 m and 160 m long run at the speed of 60 km / hr and 40 km / hr respectively in opposite directions on parallel tracks . the time ( in seconds ) which they take to cross each other , is :
[ "9", "9.6", "10", "10.8" ]
D
"explanation : relative speed = ( 60 + 40 ) km / hr = [ 100 x ( 5 / 18 ) ] m / sec = ( 250 / 9 ) m / sec . distance covered in crossing each other = ( 140 + 160 ) m = 300 m . required time = [ 300 x ( 9 / 250 ) ] sec = ( 54 / 5 ) sec = 10.8 sec . answer : d"
sciq
sciq_01_02531
When light passes from one medium to another, it changes what?
[ "speed", "density", "color", "temperature" ]
A
When light passes from one medium to another, it changes speed. For example, when light passes from air to glass, it slows down. If light strikes a sheet of glass at a 90° angle, or perpendicular to the glass, it slows down but still passes straight through the glass. However, if light enters the glass at an angle othe...
sciq
sciq_01_04164
What group includes the simplest eukaryotes, including most single-celled eukaryotes?
[ "arthropods", "bivalves", "protists", "fungi" ]
C
Most single-celled eukaryotes are protists. Protists are the simplest eukaryotes.
sciq
sciq_01_10913
How is eye color in humans determined?
[ "by the father", "multiple genes", "random chance", "temperature of the womb" ]
B
Eye color in humans is determined by multiple genes. Use the Eye Color Calculator (http://openstaxcollege. org/l/ eye_color_calc) to predict the eye color of children from parental eye color. In some cases, several genes can contribute to aspects of a common phenotype without their gene products ever directly interacti...
sciq
sciq_01_00664
What is the main function of blood?
[ "excretion of waste", "respiration", "to transport", "digestion" ]
C
The main function of blood is transport. Blood in arteries carries oxygen and nutrients to all the body’s cells. Blood in veins carries carbon dioxide and other wastes away from cells to be excreted. Blood also transports the chemical messengers called hormones to cells throughout the body where they are needed to regu...
sciq
sciq_01_07703
What type of bacteria are sometimes used as weapons of bioterrorism?
[ "carcinogenic", "avian", "pathogenic", "hypothermic" ]
C
math_qa
mathqa_03_02724
if x is to be chosen at random from the set { 1 , 2 , 3 , 4 } and y is to be chosen at random from the set { 5 , 6 , 7 } , what is the probability that xy will be even ?
[ "1 / 6", "1 / 3", "1 / 2", "2 / 3" ]
D
"in order to make even nos . by multiplication , we should have even * odd , odd * even or even * even total even nos . possible by multiplying nos . from the 2 sets : ( 1 * 6 ) ; 2 * any of the three from set b ; 3 * 6 ; & 4 * any of the three from set b 1 + 3 + 1 + 3 = 8 total possibilities = 4 * 3 = 12 p ( event ) =...
sciq
sciq_01_03671
What is the term for proportion of amount of product actually produced in a chemical reaction versus predicted amount ?
[ "decrease yield", "percent yield", "percent impact", "calculus yield" ]
B
Chemical reactions in the real world don’t always go exactly as planned on paper. In the course of an experiment, many things will contribute to the formation of less product than would be predicted. Besides spills and other experimental errors, there are usually losses due to an incomplete reaction, undesirable side r...
openbookqa
obqa_02_02329
Which of these places is worst for growing oregano?
[ "field", "farm", "greenhouse", "cave" ]
D
darkness has a negative impact on photosynthesis
sciq
sciq_01_06797
Harmful instances of what can result in errors in protein sequence that yield non-functional proteins?
[ "radiation", "infection", "mutation", "bioaccumulation" ]
C
Harmful mutations can result in errors in protein sequence, creating partially or completely non-functional proteins.
sciq
sciq_01_08519
What is a small protein that helps fight infections?
[ "zygote", "glutamate", "phenotype", "cytokine" ]
D
Genetically Engineering Bacteria to Produce a Human Protein. Bacteria can be genetically engineered to produce a human protein, such as a cytokine. A cytokine is a small protein that helps fight infections.
ARC-Challenge
arc_04_02545
Sheep Challenge Evolution A species of sheep lives on the Scottish island of Hirta. Hirta has plenty of grass for the sheep to eat, and no natural predators of the sheep live on the island. Some sheep have dark wool, and some have light wool. The sheep with dark wool tend to be much larger and stronger than the sheep w...
[ "produce more wool", "have a more restricted diet", "produce fewer offspring each year", "have a better chance of surviving and reproducing" ]
D
null
sciq
sciq_01_05733
Sucrose does not undergo reactions that are typical of aldehydes and ketones, therefore it is a nonreducing what?
[ "juice", "wheat", "salt", "sugar" ]
D
solution. In addition, sucrose does not undergo reactions that are typical of aldehydes and ketones. Therefore, sucrose is a nonreducing sugar. The hydrolysis of sucrose in dilute acid or through the action of the enzyme sucrase(also known as invertase) gives an equimolar mixture of glucose and fructose. This 1:1 mixtu...
sciq
sciq_01_05935
The shield type of what phenomenon commonly forms above hotspots in the oceans?
[ "tornado", "hurricane", "tsunami", "volcano" ]
D
Shield volcanoes commonly form above hotspots in the oceans.
ARC-Easy
arc_04_00958
A student uses a hand lens to observe which of these objects?
[ "a mountain", "the Moon", "an insect", "bacteria" ]
C
null
openbookqa
obqa_02_04004
Which of these can you use as much as you'd like of without diminishing it at all?
[ "natural gas", "sunlight", "good will", "fossil fuels" ]
B
solar energy is an inexhaustible resource
medmcqa
medmcqa_05_04238
Which of the following drugs should not be given along with Sucralfate
[ "Ranitidine", "Ciprofloxacin", "Propanalol", "Diphenhydramine" ]
A
Sucralfate polymerizes to form a sticky layer that covers ulcer base, in acidic pH. Hence, antacids like Ranitidine are avoided with sucralfate.
sciq
sciq_01_04489
Where do stratus clouds occur in the troposphere?
[ "mid to high region", "high", "mid-region", "low" ]
D
Stratus clouds occur low in the troposphere. They form in layers that spread horizontally and may cover the entire sky like a thick blanket. Stratus clouds that produce precipitation are called nimbostratus. The prefix nimbo- means “rain. ”.
math_qa
mathqa_03_00641
there has been successive increases of 25 % and then 10 % in the price of gas from the previous month . by what percentage should a driver reduce gas consumption so that the expenditure does not change ?
[ "23 %", "27 %", "31 %", "35 %" ]
B
"let p be the original price per unit of gas . let x be the original gas consumption . let y be the reduced gas consumption . y * 1.1 * 1.25 * p = x * p y = x / ( 1.1 * 1.25 ) which is about 0.73 x which is a decrease of about 27 % . the answer is b ."
math_qa
mathqa_03_01197
on dividing 109 by a number , the quotient is 9 and the remainder is 1 . find the divisor .
[ "10", "11", "12", "13" ]
C
"d = ( d - r ) / q = ( 109 - 1 ) / 9 = 108 / 9 = 12 c"
ARC-Challenge
arc_04_02413
A telescope would be used for all the following except
[ "to measure the density of Earth's atmosphere.", "to learn more about stars and planets.", "to observe the surface of the Moon.", "to better understand Earth." ]
A
null
sciq
sciq_01_03041
Neon is an example of what kind of gas?
[ "natural", "inert", "ideal", "noble" ]
D
Once we reach neon, a noble gas, all of the 2p orbitals will be completely full. Neon has a configuration of 1s 2 2s 2 2p 6 . Any further electrons will need to go in the next highest energy orbital, which would be the 3s orbital.
medmcqa
medmcqa_05_01840
Efferent of cremasteric reflex is carried by:
[ "Ilioinguinal nerve", "Genitofemoral nerve", "Iliohypogastric nerve", "Pudendal nerve" ]
B
Ans. B. Genitofemoral nerveThe cremasteric reflex is a superficial (i.e., close to the skin's surface) reflex observed in human males.This reflex is elicited by lightly stroking or poking the superior and medial (inner) part of the thigh--regardless of the direction of stroke. The normal response is an immediate contra...
sciq
sciq_01_05258
Which system consists of all the bones of the body?
[ "circulatory system", "digestive system", "nervous system", "skeletal system" ]
D
The skeletal system consists of all the bones of the body. How important are your bones?.
ARC-Challenge
arc_04_02725
A research scientist repeatedly observes a bird avoiding a specific butterfly species even though it eats other types of butterflies. Which statement most likely explains the behavior of the bird?
[ "The behavior is a random act.", "The behavior is the result of a genetic mutation.", "The behavior is inherited from the bird's parents.", "The behavior is learned over the lifetime of the bird." ]
D
null
medmcqa
medmcqa_05_04136
Which of the following is NOT used in a preterm infant to assess need for resuscitation?
[ "Color", "Hea rate", "Rate of respiration", "Muscle tone" ]
C
Respiratory effo is used instead respiratory rate in APGAR scoring system for resuscitation in neonates. Apgar scoring system: Apgar scores are a numerical expression of a newborn infant's physical condition. Usually determined 1 min after bih and again at 5 min, the score is the sum of points gained on assessment of c...
sciq
sciq_01_05742
What members of an ecosystem food chain take in food by eating producers or other living things?
[ "consumers", "insectivores", "primary producers", "decomposers" ]
A
Consumers take in food by eating producers or other living things.
sciq
sciq_01_11266
A redox reaction rearranges what subatomic particles?
[ "protons", "water molecules", "neutrons", "electrons" ]
D
A combination reaction makes a new substance from more than one reactant; a redox reaction rearranges electrons. Not all combination reactions are redox reactions, and not all redox reactions are combination reactions.
math_qa
mathqa_03_03090
every student of a certain school must play an instrument . in last year , 1 / 2 of the students picked a woodwind instrument , 2 / 5 of the students picked a brass instrument , and all of the other students took percussion . in this year , 1 / 2 of the students who play woodwind and 1 / 4 of the students who play bras...
[ "7 / 13", "4 / 5", "9 / 13", "11 / 13" ]
D
lets pick smart numbers . total number of students : 20 woodwind ( 1 / 2 ) : 10 brass ( 2 / 5 ) : 8 percussion ( 1 / 10 ) : 2 after leaving school woodwind : 5 brass : 6 percussion : 2 new total number of students : 13 woodwind and brass : 11 answer 11 / 13 or d
sciq
sciq_01_07640
What is the smallest aromatic hydrocarbon?
[ "sulfide", "phosphate", "furan", "benzene" ]
D
Unsaturated hydrocarbons called aromatic hydrocarbons are cyclic hydrocarbons that have double bonds. These compounds have six carbon atoms in a ring with alternating single and double bonds. The smallest aromatic hydrocarbon is benzene, which has just one ring. Its structural formula is shown in the Figure below . Lar...
sciq
sciq_01_03126
What are organisms called, like the red-winged blackbird, that eat many different types of food?
[ "carniverous", "generalists", "specalist", "omniverous" ]
B
Birds may be specialists or generalists in terms of what they eat. Generalists are organisms that eat many different types of food. Birds that are generalists include the red-winged blackbird in Figure below . It has a basic beak that can eat many different foods. Red-winged blackbirds are omnivores. They may eat a wid...
sciq
sciq_01_07149
When animals use incubation, how do they generally give birth to their young?
[ "live", "copying", "division", "eggs" ]
D
In most species, one or both parents take care of the eggs. They sit on the eggs to keep them warm until they hatch. This is called incubation. After the eggs hatch, the parents generally continue their care. They feed the hatchlings until they are big enough to feed on their own. This is usually at a younger age in gr...
sciq
sciq_01_07748
What relatively new addition to and highest level of the system of taxonomic classification includes just three divisions, the eukarya, the archaea, and the bacteria?
[ "branch", "content", "element", "domain" ]
D
The highest level, domain, is a relatively new addition to the system since the 1990s. Scientists now recognize three domains of life, the Eukarya, the Archaea, and the Bacteria. The domain Eukarya contains organisms that have cells with nuclei. It includes the kingdoms of fungi, plants, animals, and several kingdoms o...
medmcqa
medmcqa_05_03793
In Bing test, on alternately compressing and releasing the external acoustic meatus, the sound increases, and decreases. This indicates
[ "Otosclerosis", "Sensorineural deafness", "Adhesive otitis media", "Chronic suppurative otitis media" ]
B
Tests for bone conduction TestPrincipleMethodImpressionBing test Examines the effect of occlusion of ear canal on hearing Tuning fork placed on mastoid while examiner alternatively closes & opens the ear canal by pressing on the tragus inwards Patient hears louder when ear canal is occluded & softer when ear canal is o...
openbookqa
obqa_02_00015
A magnet will stick to
[ "a belt buckle", "a wooden table", "a plastic cup", "a paper plate" ]
A
a magnet attracts magnetic metals through magnetism
ARC-Easy
arc_04_01141
When two objects are touching, heat is transferred from the warmer object to the cooler one by
[ "radiation.", "convection.", "conduction.", "insulation." ]
C
null
medmcqa
medmcqa_05_00435
Most common site of otosclerosis is:
[ "Round window", "Oval window", "Utricle", "Ossicles" ]
B
The most common location of involvement of otosclerosis is the bone just anterior to the oval window at a small cleft known as the fissula ante fenestram.
sciq
sciq_01_10678
The rate at which an unstable isotope decays is measured in a unit known as what?
[ "half-time", "full-life", "staying-life", "half-life" ]
D
The decay of an unstable isotope to a stable element occurs at a constant rate. This rate is different for each parent-daughter isotope pair. The decay rate is measured in a unit called the half-life. The half-life is the time it takes for half of a given amount of an isotope to decay. For example, the half-life of car...
sciq
sciq_01_03086
The conservation of momentum principle can be applied to systems as different as a comet striking earth and a gas containing huge numbers of atoms and these?
[ "molecules", "protons", "ions", "particles" ]
A
The conservation of momentum principle can be applied to systems as different as a comet striking Earth and a gas containing huge numbers of atoms and molecules. Conservation of momentum is violated only when the net external force is not zero. But another larger system can always be considered in which momentum is con...
sciq
sciq_01_00858
What occurs when a substance diffuses through a cell membrane without any help from other molecules?
[ "simple diffusion", "simple filtration", "visual diffusion", "visible diffusion" ]
A
Simple diffusion occurs when a substance diffuses through a cell membrane without any help from other molecules. The substance simply passes through tiny spaces in the membrane. It moves from the side of the membrane where it is more concentrated to the side where it is less concentrated. You can see how this happens i...
medmcqa
medmcqa_05_04878
Normal duration of menstrual flow is :
[ "2-7 days", "7-10 days", "2 days", "5-9 days" ]
A
Duration of menstruation - 2-7 days Amount of blood loss - 20 to 50 mL with an average of 35 mL. Nearly 70 percent of total menstrual blood loss occurs in the first 2 days.
sciq
sciq_01_01967
What explains the spherical shape of ceres, once thought to be the largest asteroid?
[ "space debris", "high gravity", "low gravity", "orbital plane" ]
B
Ceres ( Figure below ) is a rocky body that orbits the Sun. It could be an asteroid or a planet. Before 2006, Ceres was thought to be the largest asteroid. Is it an asteroid? Ceres is in the asteroid belt. But it is by far the largest object in the belt. Ceres has such high gravity that it is spherical.
sciq
sciq_01_06178
How many neutrons do 99% of carbon atoms have?
[ "five", "six", "eight", "sixteen" ]
B
All the atoms of a given element have the same number of protons and electrons. The number of neutrons, however, may vary for atoms of the same element. For example, almost 99 percent of carbon atoms have six neutrons, but the rest have either seven or eight neutrons. Atoms of an element that differ in their numbers of...
sciq
sciq_01_01566
What is the field of biology that focuses on the study of inheritance in humans?
[ "human genetics", "relational biology", "generational biology", "computational biology" ]
A
Human genetics is the field of biology that focuses on the study of inheritance in humans.
ARC-Challenge
arc_04_02140
George wants to warm his hands quickly by rubbing them. Which skin surface will produce the most heat?
[ "dry palms", "wet palms", "palms covered with oil", "palms covered with lotion" ]
A
null