dataset
stringclasses
6 values
id
stringlengths
12
16
question
stringlengths
1
935
choices
listlengths
4
4
answer
stringclasses
4 values
support
stringlengths
0
7.76k
sciq
sciq_01_10539
What is the state of matter that resembles a gas, but is made of ions, giving it different properties than a typical gas?
[ "gamma", "acid", "vapor", "plasma" ]
D
Plasma is a state of matter that resembles a gas but has certain properties that gases do not have. Like a gas, plasma consists of particles of matter than can pull apart and spread out, so it lacks a fixed volume and a fixed shape. Unlike a gas, plasma can conduct electricity and respond to a magnetic field. That’s be...
medmcqa
medmcqa_05_01942
Poal hypeension is said to be present if poal venous pressure is more than: March 2010
[ "3-5 mm Hg", "5-8 mm Hg", "10-12 mm Hg", "15-20 mm Hg" ]
C
Ans. C: 10-12 mm HgNormal poal pressure is generally defined between 5 and 10 mm Hg.Poal hypeension results when the poal pressure rises to 12 mm Hg or greater and complications can arise, such as varices and ascites.Many conditions are associated with poal hypeension, of which cirrhosis is the most common cause
sciq
sciq_01_03381
Bacteria are what kind of cell?
[ "blood", "prokaryotes", "eukaryotes", "protists" ]
B
The rod-shaped organisms in Figure below are bacteria called Salmonella . Bacteria (bacterium, singular) are prokaryotes in the Bacteria Domain. The word Salmonella may sound familiar. That's because Salmonella is a common cause of food poisoning. Many other types of bacteria also cause human diseases. But not all bact...
sciq
sciq_01_09589
Liquid hcl can be used to do what to the ph of a swimming pool?
[ "increase it", "lower it", "raise it", "heighten it" ]
B
We all enjoy a cool dip in a swimming pool on a hot day, but we may not realize the work needed to keep that water safe and healthy. The ideal pH for a swimming pool is around 7.2. The pH will change as a result of many factors. Adjustment can be accomplished with different chemicals depending on the tested pH. High pH...
openbookqa
obqa_02_00552
Recycling happens
[ "when coal is turned into heat energy", "when fossil fuels are used by cars", "when Styrofoam plates are turned into trash", "when old Pepsi bottles are turned into t-shirts" ]
D
An example of recycling is using an object to make a new object
openbookqa
obqa_02_00474
When cutting down rain forests, it is important to keep in mind air quality. When too many trees are cut down in a given area, there may be decrease in the air's
[ "quality", "carbon dioxide", "helium amounts", "carbin dioyide levels" ]
A
carbon dioxide can be found in the air
sciq
sciq_01_07260
What is the natural movement called within your intestines?
[ "progress", "proteolysis", "peristalsis", "fibroblasts" ]
C
When most of the chyme has been absorbed, the small intestinal wall becomes less distended. At this point, the localized segmentation process is replaced by transport movements. The duodenal mucosa secretes the hormone motilin, which initiates peristalsis in the form of a migrating motility complex. These complexes, wh...
math_qa
mathqa_03_04018
if 15 men , working 9 hours a day , can reap a field in 16 days , in how many days will 18 men reap the field , working 8 hours a day ?
[ "10", "15", "20", "25" ]
B
let the required number of days be x . more men , less days ( indirect proportion ) less hours per day , more days ( indirect proportion ) men 18 : 15 hours per day 8 : 9 } : : 16 : x ( 18 x 8 x x ) = ( 15 x 9 x 16 ) = x = ( 44 x 15 ) 144 = 15 hence , required number of days = 15 . answer is b .
openbookqa
obqa_02_02311
Which of the following would be least likely to reproduce?
[ "2 protozoa", "2 oak trees", "2 female cats", "2 bacteria" ]
C
two females can not usually reproduce with each other
sciq
sciq_01_02854
The most important characteristic of extant amphibians is a moist, permeable skin used for this?
[ "benign respiration", "avian respiration", "cutaneous respiration", "simple respiration" ]
C
29.3 Amphibians As tetrapods, most amphibians are characterized by four well-developed limbs, although some species of salamanders and all caecilians are limbless. The most important characteristic of extant amphibians is a moist, permeable skin used for cutaneous respiration. The fossil record provides evidence of amp...
math_qa
mathqa_03_01179
the length of a rectangle is reduced by 30 % . by what % would the width have to be increased to maintain the original area ?
[ "42.8 %", "20 %", "25 %", "30 %" ]
A
"sol . required change = ( 30 * 100 ) / ( 100 - 30 ) = 42.8 % a"
math_qa
mathqa_03_02454
how many seconds will it take for a car that is traveling at a constant rate of 77 miles per hour to travel a distance of 21 yards ? ( 1 mile = 1,160 yards )
[ ". 1", "0.3", "0.6", "2" ]
C
"speed = 77 miles / hr = 37.64 yard / s distance = 21 yards time = distance / speed = 21 / 37.64 = 0.6 sec ans - c"
math_qa
mathqa_03_03432
the length of the rectangular field is double its width . inside the field there is square shaped pond 5 m long . if the area of the pond is 1 / 8 of the area of the field . what is the length of the field ?
[ "54'", "32'", "75'", "20'" ]
D
a / 8 = 5 * 5 = > a = 5 * 5 * 8 x * 2 x = 5 * 5 * 8 x = 10 = > 2 x = 20 answer : d
sciq
sciq_01_05738
Most animals are in which clade?
[ "metazoa", "synapsids", "bilateria", "eutheria" ]
C
sciq
sciq_01_03072
What is a defining feature of deformed sedimentary rocks?
[ "not solid", "only horizontal", "not horizontal", "not magnetic" ]
C
Sedimentary rocks that are not horizontal have been deformed.
sciq
sciq_01_10992
What is the term for flowering seed plants?
[ "gymnosperms", "spores", "angiosperms", "perennials" ]
C
Angiosperms , or flowering seed plants, form seeds in ovaries. As the seeds develop, the ovaries may develop into fruits. Flowers attract pollinators, and fruits encourage animals to disperse the seeds.
math_qa
mathqa_03_02125
a train running at the speed of 56 km / hr crosses a pole in 9 sec . what is the length of the train ?
[ "140 m", "786 m", "566 m", "546 m" ]
A
"speed = 56 * 5 / 18 = 140 / 9 m / sec length of the train = speed * time = 140 / 9 * 9 = 140 m answer : a"
sciq
sciq_01_11593
What is the name for a specific amount of solute that can dissolve in a given amount of solvent?
[ "viscosity", "humidity", "concentration", "solubility" ]
D
Solubility is a specific amount of solute that can dissolve in a given amount of solvent.
math_qa
mathqa_03_02640
the average weight of 4 persons increases by 1.5 kg . if a person weighing 65 kg is replaced by a new person , what could be the weight of the new person ?
[ "71 kg", "77 kg", "76.5 kg", "data inadequate" ]
A
"total weight increases = 4 × 1.5 = 6 kg so the weight of new person = 65 + 6 = 71 kg answer a"
medmcqa
medmcqa_05_02840
MDR/XDR treatment given for
[ "6 months", "12 months", "18 months", "24 months" ]
D
As Guidelines on Programmatic Management of Drug Resistant TB (PMDT) in IndiaRegimen for MDR-TB This regimen comprises of 6 drugs - Kanamycin, Levofloxacin, Ethionamide, Pyrazinamide, Ethambutol and Cycloserine during 6-9 months of the Intensive Phase and 4 drugs Levofloxacin, Ethionamide, Ethambutol and Cycloserine du...
sciq
sciq_01_05877
In his work with pea plants, mendel performed what, which involves mating two true-breeding individuals that have different traits?
[ "cross-breeding", "hybridization", "mutations", "assimilation" ]
B
These are plants that always produce offspring that look like the parent. By experimenting with true-breeding pea plants, Mendel avoided the appearance of unexpected traits in offspring that might occur if the plants were not true breeding. The garden pea also grows to maturity within one season, meaning that several g...
sciq
sciq_01_10852
Birds have light-weight bones that are filled with what?
[ "air", "water", "blood", "proteins" ]
A
Birds have light-weight bones that are filled with air. They also lack a jaw, which in many vertebrates is a dense, heavy bone with many teeth. Instead, birds have a light-weight keratin beak without teeth.
openbookqa
obqa_02_04495
Absorbing sunlight causes objects to what?
[ "cool", "chill", "freeze", "blaze up" ]
D
absorbing sunlight causes objects to heat
medmcqa
medmcqa_05_03746
A patient from Himachal Pradesh presents with fever from 5 days, altered sensorium increased JPV, maculo-papular rash & erythima on back with black necrotic tissue. Treatment includes-
[ "Aminoglycosides", "Chloramphenicol", "Tetracycline", "Doxycycline" ]
A
Ecthyma gangrenosum is a cutaneous infection most commonly associated with Pseudomonas bacteraemia. Ecthyma gangrenosum usually occurs in patients who are critically ill and immunocompromised. The characteristic lesions of ecthyma gangrenosum are haemorrhagic (bloody) pustules that evolve into necrotic (black) ulcers T...
openbookqa
obqa_02_03371
Acid rain could effect
[ "an indoor pizza", "an indoor TV", "inside the house", "a car's color" ]
D
acid rain has a negative impact on water quality
sciq
sciq_01_04109
Europa and titan are names of what kind of celestial objects?
[ "stars", "asteroids", "galaxies", "moons" ]
D
Saturn’s largest moon, Titan, is about one and a half times the size of Earth’s moon. Titan is even larger than the planet Mercury. The picture below compares the size of Titan to Earth ( Figure below ). Scientists are very interested in Titan. The moon has an atmosphere that is thought to be like Earth’s first atmosph...
sciq
sciq_01_01976
Winter storms develop from what, which form at high altitudes and are associated with hurricanes as well?
[ "cyclones", "currents", "fronts", "droughts" ]
A
Like hurricanes, winter storms develop from cyclones. But in the case of winter storms, the cyclones form at higher latitudes. In North America, cyclones often form when the jet stream dips south in the winter. This lets dry polar air pour south. At the same time, warm moist air from the Gulf of Mexico flows north. Whe...
sciq
sciq_01_11019
What happens to the total energy of the system when heat is positive?
[ "nothing", "it remains constant", "it decreases", "it increases" ]
D
When heat is positive, the total energy of the system is increasing.
sciq
sciq_01_07556
What do dendrites from the cell body recieve impulses from?
[ "other cells", "axon", "myelin", "other neurons" ]
D
Dendrites extend from the cell body and receive nerve impulses from other neurons.
medmcqa
medmcqa_05_00972
The most cost-effective family planning method is-
[ "Vasectomy", "Barrier method", "DMPA", "Oral pills" ]
A
Vasectomy and IUD are one of the most cost-effective methods of contraception. Most impoant demographic feility indicator is -NRR. To achieve NRR-1, CPR should be >60%, ideal contraception is sterilization .
openbookqa
obqa_02_03926
Bacteria will build up on food if you leave it out, so if you make sure its protected from the air, you can
[ "go to space", "lift a bus", "Fly", "avoid falling ill" ]
D
reducing bacteria in food prevents illness in people
openbookqa
obqa_02_02055
Which is the least massive?
[ "the Earth", "the moon", "the sun", "the solar system" ]
B
the earth has more mass than the moon
openbookqa
obqa_02_04586
A baby bear has golden fur which is medium length. The reason for this is most likely
[ "gene contributors shared that characteristic", "its parents are polar bears", "mother bear has blue eyes", "parents all have black fur" ]
A
the coloration of fur is an inherited characteristic
ARC-Challenge
arc_04_02232
Students studying membranes conducted an experiment using labeled paper cups filled with varying concentrations of red food coloring. After the experiment, the cups were empty and stained. What should be done with used cups?
[ "reuse the cups", "dispose of the cups", "recycle the cups", "relabel the cups" ]
C
null
sciq
sciq_01_05508
What do we call the only light that people can see?
[ "visible light", "wave light", "natural light", "spectral light" ]
A
The only light that people can see is called visible light . This light consists of a very narrow range of wavelengths that falls between infrared light and ultraviolet light. Within the visible range, we see light of different wavelengths as different colors of light, from red light, which has the longest wavelength, ...
medmcqa
medmcqa_05_04672
Wrist joint is formed by articulation of -
[ "Lower end of radius and carpal bones", "Lower end of radius, articular disc and carpal bones", "Lower end of radius and ulna, and carpal bones", "Lower end of radius and intercarpal joint or inferior radioulnar joint" ]
B
Components of wrist joint -        Distal end of radius -        Articular disc of inferior radioulnar joint -        Scaphoid, lunate, triquetral.
sciq
sciq_01_01035
What organ system consists of the skin, nails and hair?
[ "endocrine system", "integumentary system", "digestive system", "nervous system" ]
B
The skin is the major organ of the integumentary system , which also includes the nails and hair. In fact, the skin is the body’s largest organ, and a remarkable one at that. Consider these skin facts. The average square inch (6.5 cm 2 ) of skin has 20 blood vessels, 650 sweat glands, and more than a thousand nerve end...
medmcqa
medmcqa_05_01771
Which of these is not a grevious injury?
[ "Loss of teeth", "Loss of hearing of one ear", "Permanent disfiguration of face.", "Abrasion on face." ]
D
Abrasion on face Grevious injury Section 320 1PC defines following injuries as grevious injury: I. Emasculation (cutting of the penis, castration, or causing loss of power of erection due to spinal injury). 2. Permanent privation of the sight of either eye. 3. Permanent privation of the hearing of either ear. 4. Privat...
sciq
sciq_01_08283
Spirals, spheres, and rods are examples of what distinguishing property of bacteria?
[ "shape", "color", "function", "organ" ]
A
Bacteria come in many different shapes. Some of the most common shapes are bacilli (rods), cocci (spheres), and spirilli (spirals). Bacteria can be identified and classified by their shape.
math_qa
mathqa_03_03118
if the cost price is 80 % of the selling price , then what is the profit percent ?
[ "5 %", "11 %", "13 %", "25 %" ]
D
"let s . p . = $ 100 c . p . = $ 80 profit = $ 20 profit % = 20 / 80 * 100 = 25 / 6 = 25 % answer is d"
ARC-Challenge
arc_04_02164
Coal is solid rock that began as organic material that was deposited in a swamp. The formation of coal suggests that
[ "coal is made mostly of skeletal remains of animals.", "coal is formed from magma that has solidified over time.", "it quickly becomes petrified when water is removed.", "geologic processes continue over millions of years." ]
D
null
sciq
sciq_01_01599
Where are hormones released?
[ "liver", "lungs", "bloodstream", "brain" ]
C
Signaling molecules can belong to two broad groups. Neurotransmitters are released at synapses, whereas hormones are released into the bloodstream. These are simplistic definitions, but they can help to clarify this point. Acetylcholine can be considered a neurotransmitter because it is released by axons at synapses. T...
math_qa
mathqa_03_02691
evaluate ( 51 + 52 + 53 + . . . + 100 )
[ "3775", "3665", "3456", "3459" ]
A
sn = ( 1 + 2 + 3 + . . . + 50 + 51 + 52 + . . . + 100 ) - ( 1 + 2 + 3 + . . . + 50 ) = ( 50 x 101 ) - ( 25 x 51 ) = ( 5050 - 1275 ) = 3775 . option a
sciq
sciq_01_10356
A measure of how close a series of measurements are to one another is what?
[ "density", "reflection", "precision", "calculation" ]
C
precision: A measure of how close a series of measurements are to one another. Precise measurements are highly reproducible, even if the measurements are not near the correct value.
sciq
sciq_01_06432
Two important concepts, niche and habitat, are associated with what?
[ "water", "plant", "ecosystem", "natural selection" ]
C
Two important concepts associated with the ecosystem are niche and habitat.
ARC-Challenge
arc_04_02945
A change in the density of air can result in a breeze. Which diagram best shows a series of energy transfers that begins with the Sun and results in a breeze?
[ "radiation → conduction → breeze", "radiation → conduction → convection → breeze", "convection → radiation → breeze", "convection → conduction → radiation → breeze" ]
B
null
math_qa
mathqa_03_04774
the marks obtained by vijay and amith are in the ratio 4 : 4 and those obtained by amith and abhishek in the ratio of 3 : 2 . the marks obtained by vijay and abhishek are in the ratio of ?
[ "3 : 2", "6 : 1", "6 : 5", "6 : 2" ]
A
"4 : 4 3 : 2 - - - - - - - 12 : 12 : 8 12 : 8 3 : 2 answer : a"
sciq
sciq_01_01280
Which theory describes the benzene molecule and other planar aromatic hydrocarbon molecules as hexagonal rings of sp2-hybridized carbon atoms with the unhybridized p orbital of each carbon atom perpendicular to the plane of the ring?
[ "covalent bond theory", "valence bond theory", "molecular orbital theory", "hybrid orbital theory" ]
B
Valence bond theory describes the benzene molecule and other planar aromatic hydrocarbon molecules as hexagonal rings of sp2-hybridized carbon atoms with the unhybridized p orbital of each carbon atom perpendicular to the plane of the ring. Three valence electrons in the sp2 hybrid orbitals of each carbon atom and the ...
medmcqa
medmcqa_05_04386
Cardiac output = 5 lit/min. BSA = 1.7 m2, calculate the cardiac index:
[ "5 L/m2", "4.8 L/m2", "3.0 L/m2", "3.7 L/m2" ]
C
Ans. C.3.0L/m2Cardiac output average = 5.0 L/minCardiac index = cardiac out per square of body surface area.=5L/min1.7m2=3lit/min/m2
medmcqa
medmcqa_05_03502
Lust murder is an extreme form of: MP 09
[ "Troilism", "Algolagnia", "Masochism", "Frotteurism" ]
B
Ans. Algolagnia
medmcqa
medmcqa_05_03078
Sunflower cataract is seen
[ "Blunt trauma", "Williams disease", "Wilson's disease", "Myotonic dystrophy" ]
C
Sunflower cataract is seen in Wilson's disease. It is considered as a second opthalmic sign of Wilson's disease after KF ring.
sciq
sciq_01_05798
Mendel’s observation of pea plants also included many crosses that involved multiple traits, which prompted him to formulate the principle of this?
[ "independent texture", "independent assortment", "dependent evolution", "independent contain" ]
B
Mendel’s observation of pea plants also included many crosses that involved multiple traits, which prompted him to formulate the principle of independent assortment. The law states that the members of one pair of genes (alleles) from a parent will sort independently from other pairs of genes during the formation of gam...
medmcqa
medmcqa_05_04429
After Hyperventilating for some time holding the breath is dangerous because –
[ "Decrease CO2 shift the O2 dissociation curve to the left", "Alkalosis can lead to tetany", "It can lead to CO2 Narcosis", "Due to lack of stimulation by CO2, anoxia can go into dangerous levels" ]
D
In our body its not O2, but CO2 that maintains the respiratory drive (though main function of respiration is to maintain adequate oxygen level in the body) Thus its not hypoxia but hypercarbia that is required to inform the brain that respiration is inadequate. If normally a person holds his breath he will soon have de...
ARC-Challenge
arc_04_02321
Which of the following elements is the least electrically conductive?
[ "sodium", "tungsten", "zinc", "argon" ]
D
null
medmcqa
medmcqa_05_01378
The pa of the male urethra where the urethral crest is situated in is?
[ "Penile urethra", "Pre-prostatic urethra", "Prostatic urethra", "Membranous urethra" ]
C
The Urethral Crest is a midline, longitudinal, ridge like projection of mucosa which lies on the posterior wall of prostatic urethra.
math_qa
mathqa_03_04201
two pipes a and b can fill a cistern in 12 and 15 minutes respectively . both are opened together but after 4 minutes a is turned off . after how much more time will the cistern be filled ?
[ "6", "8 1 / 1", "8 1 / 4", "8 1 / 2" ]
A
"4 / 12 + ( 4 + x ) / 15 = 1 x = 6 answer : a"
medmcqa
medmcqa_05_04851
Most common age for intusuppetion is -
[ "0-6 Months", "6 Months -3yrs", "3-5Yrs", "> 5 yrs" ]
B
Ans. is 'b' i.e., 6 months - 3 yrs. o An intussusception is composed of three parts:The entering or inner tube - intussusceptumThe returning or middle tubeThe sheath or outer tube - intussuscipiensIntussusceptiono Intussusception is the telescoping of one portion of the intestine into the other,o It is the most common ...
openbookqa
obqa_02_04020
An example of being a predator is
[ "an eagle landing on a branch", "a mouse taking shelter in a hole", "a wolf having a litter of pups", "a bird catching worms in its mouth" ]
D
a beak is used for catching prey by some birds
openbookqa
obqa_02_02078
A person needing to use a renewable resource would consider all with the exception of
[ "solar energy", "water source", "hydrocarbon gas mixture", "wind power" ]
C
natural gas is a nonrenewable resource
math_qa
mathqa_03_04150
two numbers are in the ratio 3 : 4 . if their l . c . m . is 96 . what is sum of the numbers ?
[ "48", "56", "76", "84" ]
B
"explanation : let the numbers be 3 x and 4 x lcm of 3 x and 4 x = 12 x ( since lcm of 3 and 4 is 12 . hence lcm of 3 x and 4 x is 12 x ) given that lcm of 3 x and 4 x is 96 = > 12 x = 96 = > x = 96 / 12 = 8 sum of the numbers = 3 x + 4 x = 7 x = 7 x 8 = 56 answer : option b"
sciq
sciq_01_05199
What type of climates is malaria commonly found in?
[ "tropical and subtropical", "tropical and permafrost", "arid and arctic", "tropic and arctic" ]
A
Malaria is common in tropical and subtropical climates throughout the world (see Figure below ). In fact, malaria is one of the most common infectious diseases on the planet. Malaria is also a very serious disease. It kills several million people each year, most of them children.
math_qa
mathqa_03_00722
a dishonest dealer professes to sell goods at the cost price but uses a weight of 700 grams per kg , what is his percent ?
[ "42.8 %", "25 %", "55 %", "28 %" ]
A
"700 - - - 300 100 - - - ? = > 42.8 % answer : a"
sciq
sciq_01_02539
What is the term for the movement of individuals out of a population?
[ "emigration", "colonization", "succession", "immigration" ]
A
Emigration is the movement of individuals out of a population. This decreases the population size and growth rate.
math_qa
mathqa_03_03935
shopkeeper rise price by 32 % and gives successive discount of 10 % and 15 % . what is overall % gain or loss ?
[ "0.98 %", "4.98 %", "3.95 %", "6.98 %" ]
A
"let d initial price be 100 32 % rise now price = 132 / 100 * 100 = 132 10 % discount then price = 132 * 90 / 100 = 118.8 15 % discount then price = 118.8 * 85 / 100 = 100.98 so gain = 100.98 - 100 = 0.98 gain % = gain * 100 / cp = = > 0.98 * 100 / 100 = 0.98 % answer : a"
openbookqa
obqa_02_01927
If I am out in the sun all day I should
[ "go naked", "drink wine", "avoid it occasionally", "wear a coat" ]
C
if something is outside during the day then that something will receive sunlight
sciq
sciq_01_00552
When acellular slime molds swarm, they fuse together to form a single cell with many what?
[ "nuclei", "digestive tracts", "cytoplasm", "lungs" ]
A
When acellular slime molds swarm, they fuse together to form a single cell with many nuclei.
sciq
sciq_01_04583
What term is used to describe the development of new technology?
[ "variation design", "technological design", "evident design", "Smart Design" ]
B
The development of new technology is called technological design . It is similar to scientific investigation. Both processes use evidence and logic to solve problems.
sciq
sciq_01_10312
Irrigation can waste a lot of what natural resource?
[ "fertilizer", "water", "money", "habitat" ]
B
Irrigation can waste a lot of water. The type of irrigation shown in Figure below is the most wasteful. The water is sprayed into the air and then falls to the ground. But much of the water never reaches the crops. Instead, it evaporates in the air or runs off the fields. Irrigation water may cause other problems. The ...
ARC-Easy
arc_04_00089
When an earthquake wave passes from the crust to the mantle, the wave
[ "reverses direction.", "changes speed.", "increases energy.", "stops moving." ]
B
null
sciq
sciq_01_07895
The fetal stage begins about how long after fertilization?
[ "four months", "two months", "three months", "one month" ]
B
The fetal stage begins about two months after fertilization and continues until birth. During this stage, organs continue to develop, and the fetus grows in size.
medmcqa
medmcqa_05_00600
Repetition of movements, act and words, phrases is:
[ "Fusion", "Mannerism", "Perseveration", "Stereo-typing" ]
C
Perseveration
sciq
sciq_01_03995
What is the most effective color in interrupting the nighttime portion of the photoperiod?
[ "white light", "blue light", "yellow", "red light" ]
D
sciq
sciq_01_10203
What do you call a device that produces a very focused beam of visible light of just one wavelength and color?
[ "light meter", "optical diffuser", "fusion relay", "laser" ]
D
Did you ever see a cat chase after a laser light, like the one in Figure below ? A laser is a device that produces a very focused beam of visible light of just one wavelength and color. Waves of laser light are synchronized so the crests and troughs of the waves line up. The diagram in Figure below shows why a beam of ...
openbookqa
obqa_02_00424
Seed dispersal happened when the plant's seeds were
[ "sold to a person in another country", "genetically modified for pesticide resitance", "destroyed by radiation during processing", "planted in the same garden" ]
A
seed dispersal is when the seeds of a plant are spread from the parent plant to another area
ARC-Easy
arc_04_00867
Many scientists theorize that global warming will melt the polar ice caps. What would most likely happen if the polar ice caps melted?
[ "Ocean levels would increase.", "Human population would increase.", "Vegetation in water would decrease.", "Global precipitation would decrease." ]
A
null
sciq
sciq_01_01299
The angle of refraction depends on the index of what?
[ "reflection", "frequency", "refraction", "vibration" ]
C
Refraction is responsible for dispersion in rainbows and many other situations. The angle of refraction depends on the index of refraction, as we saw in The Law of Refraction. We know that the index of refraction n depends on the medium. But for a given medium, n also depends on wavelength. (See Table 25.2. Note that, ...
sciq
sciq_01_09995
Foresters commonly inoculate pine seedlings with a type of what to promote growth?
[ "soil", "fungi", "yeast", "proteins" ]
B
sciq
sciq_01_05511
What can water's high surface tension be attributed t?
[ "electric impulses in atoms", "molecules create a thin film-like substance", "territorial molecules sticking together", "polar molecules sticking together" ]
D
Water has remarkable properties. Water expands when it freezes, even though all other substances contract. This means that in the winter ice on a pond or lake will float. Water has high surface tension because polar molecules tend to stick together. That's why drops stick together or some bugs can walk on the surface o...
sciq
sciq_01_06206
Concentric circles that spread out through the water around the droplets are actually types of what moving through the water?
[ "winds", "waves", "lines", "troughs" ]
B
No doubt you’ve seen this happen. Droplets of water fall into a body of water, and concentric circles spread out through the water around the droplets. The concentric circles are waves moving through the water.
math_qa
mathqa_03_04131
the average weight of 20 persons sitting in a boat had some value . a new person added to them whose weight was 49 kg only . due to his arrival , the average weight of all the persons decreased by 5 kg . find the average weight of first 20 persons ?
[ "55", "56", "57", "58" ]
B
"20 x + 49 = 21 ( x – 5 ) x = 56 answer : b"
medmcqa
medmcqa_05_03540
Conversion of phenylalanine to tyrosine is hampered in -
[ "Phenylketonuria", "Alkaptonuria", "Maple syrup disease", "Tyrosinemia" ]
A
Ans. is 'a' i.e., Phenylketonuria o Phenylketonuria is characterized by inability of oxidation of phenylalanine into tyrosine.Phenylketonuriao It is an inborn metabolism of phenylalanine, in which there is inability of oxidation of phenylalanine into tyrosine. There is defective function ofphenylalanine hydroxylase, wh...
ARC-Challenge
arc_04_02602
Which of these is an element?
[ "KBr", "O_{2}", "2KCl", "FeO_{2}" ]
B
null
math_qa
mathqa_03_03344
1 / 4 of all the juniors and 2 / 3 of all the seniors are going on a trip . if there are 2 / 3 as many juniors as seniors , what fraction of the students are not going on the trip ?
[ "4 / 9", "1 / 2", "2 / 3", "1 / 3" ]
B
j be the number of juniors and s be the number of seniors . there are 2 / 3 as many juniors as seniors 23 ∗ s = j j / s = 23 going on trip = j 4 + 23 ∗ s fraction = ( j 4 + 23 s ) / ( j + s ) = ( 2 / 3 * 1 / 4 + 2 / 3 ) / ( 2 / 3 + 1 ) = 1 / 2 fraction not on trip = 1 / 2 answer : b
sciq
sciq_01_11113
In multicellular organisms, only mutations in cell lines that produce gametes can be passed to what?
[ "offspring", "clones", "cells", "proteins" ]
A
math_qa
mathqa_03_00223
the volume of a certain substance is always directly proportional to its weight . if 48 cubic inches of the substance weigh 112 ounces , what is the volume , in cubic inches , of 60 ounces of this substance ?
[ "27", "36", "25", "64" ]
C
"112 ounces of a substance has a volume of 48 cubic inches 60 ounces of a substance has a volume of ( 48 / 112 ) * 60 = 25 cubic inches answer a alternatively , we can use estimation 112 ounces of a substance has a volume of 48 cubic inches 56 ounces of a substance has a volume of 24 cubic inches therefore , 60 will ha...
medmcqa
medmcqa_05_02873
Brush burn is due to
[ "Friction injury", "Firearm injury", "Electrical injury", "Graze abrasion" ]
D
D i.e. Graze abrasion
openbookqa
obqa_02_01660
Bananas spread their chromosomes because of
[ "bats", "apples and oranges", "snakes", "Jamaican singers" ]
A
seed dispersal has a positive impact on a plant
sciq
sciq_01_08068
In dioecious animals, females generally produce what contribution to reproduction?
[ "intelligence", "eggs", "milk", "warmth" ]
B
During sexual reproduction, two parents are involved. Most animals are dioecious , meaning there is a separate male and female sex, with the male producing sperm and the female producing eggs. When a sperm and egg meet during fertilization , a zygote , the first cell of a new organism, is formed ( Figure below ). This ...
openbookqa
obqa_02_00472
The spinal cord contains
[ "electrically excitable cells", "nerve gas", "biological impulses", "hair follicles" ]
A
nerves are made of nerve cells
medmcqa
medmcqa_05_03623
The regional aerial resistance of the mesentery and kidney is reduced by-
[ "Dopamine", "Nor adrenaline", "Adrenaline", "Isoprenaline" ]
A
The D1 receptor in renal and mesenteric blood vessels are the most sensitive. I/V infusion of low dose of dopamine dilates these vessels (by raising intracellular cAMP). This increases GFR in addition dopamine exes natriuretic effect by D1 receptors on proximal tubules.
sciq
sciq_01_09997
What type of alloys are used in musical instruments?
[ "copper", "brass", "bronze", "plastics" ]
B
Brass alloys have long been employed in musical instruments.
openbookqa
obqa_02_03807
Seals have an instinct to give birth in the same area every year. Where do seals give birth normally?
[ "Jupiter", "space", "waterfronts", "houses" ]
C
seals every year return to the same beaches to give birth
sciq
sciq_01_09672
What makes metals shiny?
[ "light energy", "light reflection", "light expansion", "light characterization" ]
B
Metals are generally shiny. This is because they reflect much of the light that strikes them. The mercury pictured above is very shiny.
ARC-Easy
arc_04_01322
Which tool should be used to compare the growth of an algal colony growing in a petri dish?
[ "a scale", "a ruler", "a hand lens", "a balance scale" ]
C
null
sciq
sciq_01_04546
Within each sporangium, hundreds of what kind of spores develop and are dispersed through the air?
[ "haploid", "polyploid", "diploid", "infertile" ]
A
ARC-Challenge
arc_04_02430
When a compression wave travels through a medium, in what direction is the medium displaced?
[ "upward", "downward", "in the same direction", "in the opposite direction" ]
C
null
sciq
sciq_01_02889
What is the climate of a small area called?
[ "ecosystem", "microclimate", "microevolution", "biome" ]
B
Climate conditions in a small area may be different from those of the surroundings. The climate of the small area is called a microclimate . The microclimate of a valley may be cool relative to its surroundings since cold air sinks. The ground surface may be hotter or colder than the air a few feet above it. This is be...
sciq
sciq_01_07789
A tropism where light is the stimulus is known as what?
[ "phototropism", "Atropism", "Thermotropism", "Geotropism" ]
A
You might have noticed that plants bend toward the light. This is an example of a tropism where light is the stimulus, known as phototropism ( Figure below ). To obtain more light for photosynthesis, leaves and stems grow toward the light. On the other hand, roots grow away from light. This is beneficial for the roots,...
sciq
sciq_01_03872
What type of plants supplement their mineral nutrition by digesting animals?
[ "annuals", "perennials", "herbivorous", "carnivorous" ]
D
sciq
sciq_01_11564
What chemical element helps forms strong bones and teeth in humans?
[ "calcium", "potassium", "iron", "magnesium" ]
A
Minerals are chemical elements that are essential for body processes. They include calcium, which helps form strong bones and teeth, and potassium, which is needed for normal nerve and muscle function. Good sources of minerals include leafy, green vegetables, whole grains, milk, and meats.