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sciq
sciq_01_04272
When gas particles collide, what kinds of collisions are these considered?
[ "inelastic", "elastic", "conservative", "perfect" ]
B
Collisions of gas particles are elastic, so no energy is lost.
openbookqa
obqa_02_04714
Wind is a resource we can renew because there is an
[ "seven", "endless supply", "nothing", "limited supply" ]
B
wind is a renewable resource
sciq
sciq_01_09313
Which orbitals do electrons fill first?
[ "furthest from nucleus", "closest to the nucleus", "empty orbitals", "charged orbitals" ]
B
Electrons fill orbitals in a consistent order: they first fill the orbitals closest to the nucleus, then they continue to fill orbitals of increasing energy further from the nucleus. If there are multiple orbitals of equal energy, they will be filled with one electron in each energy level before a second electron is ad...
openbookqa
obqa_02_03623
Old glory waves thanks to a
[ "pulley", "magic", "guy climbing up", "bird" ]
A
a pulley is used to lift a flag on a flagpole
math_qa
mathqa_03_03503
two trains of equal length , running with the speeds of 60 and 40 kmph , take 36 seconds to cross each other while they are running in the same direction . what time will they take to cross each other if they are running in opposite directions ?
[ "10 sec", "16 sec", "19 sec", "7.2 sec" ]
D
rs = 60 - 40 = 20 * 5 / 18 = 100 / 18 t = 36 d = 36 * 100 / 18 = 200 rs = 60 + 40 = 100 * 5 / 18 t = 200 * 18 / 500 = 7.2 sec answer : d
math_qa
mathqa_03_00622
how many 2 digit number contain number 3 ?
[ "18", "28", "38", "68" ]
A
"total 2 digit no . = 9 * 10 * = 90 not containing 3 = 8 * 9 = 72 total 2 digit number contain 3 = 90 - 72 = 18 answer : a"
medmcqa
medmcqa_05_01119
Which of the following is a propey of amino acids at isoelectric pH?
[ "Maximum buffering action", "Maximum precipitability", "Maximum solubulity", "Mobility in electric field" ]
B
The propeies of an amino acid at isoelectric pH are as follows: Maximum precipitability Minimum buffering action (note: maximum buffering action is when the pH=pKa, and not at isoelectric pH) Minimum solubility No mobility in an electric field Reference Reference: Harpers illustrated biochemistry 30th edition
medmcqa
medmcqa_05_02316
Speed of induction of anaesthesia is fast with which of the following anaesthetic agent and thus suitable for day care surgery
[ "Halothane", "Desflurane", "Enflurane", "Methoxyflurane" ]
B
Desflurane is inhalational anaesthetic agent of choice for day care surgery.
sciq
sciq_01_09855
What consists mainly of parenchymal cells with chloroplasts?
[ "mesophyll", "mitochondria", "chlorophyll", "periosteum" ]
A
Mesophyll makes up most of the leaf’s interior. This is where photosynthesis occurs. Mesophyll consists mainly of parenchymal cells with chloroplasts.
sciq
sciq_01_06492
Fruit comes from the ovaries of what types of plants?
[ "deciduous", "flowering", "perennial", "sprouting" ]
B
Although flowers and their components are the major innovations of angiosperms, they are not the only ones. Angiosperms also have more efficient vascular tissues. Additionally, in many flowering plants the ovaries ripen into fruits. Fruits are often brightly colored, so animals are likely to see and eat them and disper...
openbookqa
obqa_02_03196
If sound is moving around in a room, the room is lacking in
[ "atmosphere", "vacuum", "oxygen", "air" ]
B
air is a vehicle for sound
sciq
sciq_01_09664
Platelets play a role in what cascade of reactions that converts plasma fibrinogen to fibrin?
[ "hemophilia", "sickle cell anemia", "blood clotting", "bleeding" ]
C
sciq
sciq_01_03698
What do microbes use to make food?
[ "chemicals", "sunlight", "nitrogen", "plants" ]
A
Microbes use chemicals to make food. The chemicals pour out of a crack on the ocean floor at a mid-ocean ridge. What consumers live in this ecosystem?.
sciq
sciq_01_02631
What are regular changes in biology or behavior that occur in a 24 hour cycle?
[ "auditory rhythm", "life cycle", "circadian rhythm", "cognitive rhythm" ]
C
Circadian rhythms are regular changes in biology or behavior that occur in a 24-hour cycle. In humans, for example, blood pressure and body temperature change in a regular way throughout each 24-hour day.
sciq
sciq_01_05181
What do plants respond to in their environment?
[ "changes in metal or water", "changes in sunlight or water", "changes in temperature or water", "changes in sunlight or pressure" ]
B
Like all organisms, plants detect and respond to stimuli in their environment. Their main response is to change how they grow.
sciq
sciq_01_09761
Many protists form what kind of beneficial association with other species?
[ "Opportunistic", "Facultative", "evolved", "symbiotic" ]
D
ARC-Easy
arc_04_00616
A student crumples up a sheet of paper. Which property of the paper has changed?
[ "color", "mass", "state", "shape" ]
D
null
openbookqa
obqa_02_03054
A human can, merely by pushing on it, cause a visible alteration in the shape of a
[ "manly sculpture", "inhumanly tall building", "plastic dinner container", "standard burning sun" ]
C
if a flexible container is pushed on then that container will change shape
sciq
sciq_01_10827
What type of motor is used in most household devices with moving parts?
[ "cooling motors", "vacuum motors", "thermal motors", "electric motors" ]
D
Many common electric devices contain electromagnets. Some examples include hair dryers, fans, CD players, telephones, and doorbells. Most electric devices that have moving parts contain electric motors. You can read below how doorbells and electric motors use electromagnets.
sciq
sciq_01_02016
What two types of junctions do animal cells have?
[ "tight and gap", "loose and tight", "gap and solid", "standard and specialized" ]
A
math_qa
mathqa_03_00749
a palindrome is a word or a number that reads the same forward and backward . for example , 2442 and 111 are palindromes . if 5 - digit palindromes are formed using one or more of the digits 1 , 2 , 3 , 4 , 5 , and 6 , how many palindromes are possible ?
[ "36", "96", "132", "216" ]
D
"there are 6 choices for each of the first three digits . the number of possible palindromes is 6 ^ 3 = 216 . the answer is d ."
math_qa
mathqa_03_04887
two trains are moving at 80 kmph and 70 kmph in opposite directions . their lengths are 150 m and 100 m respectively . the time they will take to pass each other completely is ?
[ "6 sec", "7 sec", "7 2 / 2 sec", "8 sec" ]
A
70 + 80 = 150 * 5 / 18 = 125 / 3 mps d = 150 + 100 = 250 m t = 250 * 3 / 125 = 6 sec answer : a
medmcqa
medmcqa_05_00914
Burtonian line is seen in poisoning by -
[ "Lead", "Mercury", "Copper", "Morphine" ]
A
Ans. is 'a > b & c' i.e., Lead > Mercury & Copper * Burtonian line is blue line, which is seen on upper gums in lead poisoning.* Similar blue line (but not called burtonian line in these cases) is also seen in poisoning with Mercury (Hg), Copper (Cu), Silver (Ag), bismuth (Bi), and Iron (Fe).
openbookqa
obqa_02_00029
An example of a chemical change is acid breaking down substances, another is
[ "flour added to salt", "milk added to water", "corn added to soup", "lemon juice added to milk" ]
D
An example of a chemical change is acid breaking down substances
medmcqa
medmcqa_05_04383
Hematuria is a feature of snake bite due to
[ "Cobra", "Krait", "viper", "Sea snake" ]
C
Viper venom is predominantly hemotoxic. There will be hemolysis , decrease in RBC count and platelet count The bleeding time and clotting time will be prolonged. Disseminated intravascular coagulation(DIC) will occur and there will be bleeding from gums, rectum and site of bite. There will be signs of renal failure. Th...
openbookqa
obqa_02_03574
Four times a year you will see a different
[ "climate", "person", "moon", "star" ]
A
a new season occurs once per three months
sciq
sciq_01_02573
Glasses are mixtures of oxides, the main component of which is silica (sio2). silica is called the glass former, while additives are referred to as this?
[ "glass modifiers", "natural modifiers", "addition modifiers", "glass actors" ]
A
♦ Glasses are mixtures of oxides, the main component of which is silica (SiO2). Silica is called the glass former, while additives are referred to as glass modifiers. The crystalline lattice of the glass former breaks down during heating, producing the random atomic arrangements typical of a liquid. Adding a modifier a...
math_qa
mathqa_03_02154
the ratio of pens to pencils is 5 to 6 . there are 9 more pencils than pens . how many pencils are there ?
[ "36", "42", "48", "54" ]
D
let the number of pens be 5 x and the number of pencils be 6 x . 6 x - 5 x = 9 x = 9 the number of pencils is 54 . the answer is d .
sciq
sciq_01_05984
What takes place at some coastlines or along the equator and brings cool, nutrient-rich water to the surface?
[ "high tide", "flooding", "upwelling", "red tide" ]
C
Upwelling takes place at some coastlines or along the Equator. Upwelling brings cool, nutrient-rich water to the surface.
openbookqa
obqa_02_03929
To make hydropower you need
[ "to burn fossil fuels", "to stop or slow moving water", "to fill a pool with water", "to put up windmills" ]
B
hydropower requires damming a river
openbookqa
obqa_02_00994
Which is the source of a nonrenewable resource?
[ "rain", "the wind", "the Sun", "oil deposits" ]
D
plastic is a nonrenewable resource
sciq
sciq_01_01105
Radar maps of venus show that it has mountains, canyons and volcanoes surrounded by plains of what?
[ "water", "lava", "helium", "grasses" ]
B
Radar maps of Venus show that it has mountains, canyons and volcanoes surrounded by plains of lava.
medmcqa
medmcqa_05_01126
While measuring jugular venous pressure, 'a' wave is indicative of:
[ "Atrial filling", "Atrial relaxation", "Atrial contraction", "Ventricular relaxation" ]
C
The pressure pulsations that occur in the right atrium are transmitted in retrograde fashion to the large veins near the hea. Atrial contraction produces the first pressure peak called the a wave. The c wave is the transmitted manifestation of the rise in atrial pressure produced by the bulging of the tricuspid valve i...
ARC-Challenge
arc_04_02772
People use water in different ways. Which of these activities wastes water?
[ "filling a glass with water", "leaving a faucet on", "soaking vegetables in water to clean them", "adding cups of water as directed by a recipe" ]
B
null
medmcqa
medmcqa_05_04676
Double apical impulse is seen in-
[ "Myocardial infarction", "Tricuspic regurgitition", "aoic stenosis", "cardiac tamponade" ]
C
pulsus bisferiens, , is a sign where, on palpation of the pulse, a double peak per cardiac cycle can be appreciated. Bisferious means striking twice. Classically, it is detected when aoic insufficiency exists in association with aoic stenosis, but may also be found in isolated but severe aoic insufficiency and hyperoph...
sciq
sciq_01_05248
Amplification that occurs in which cells often requires signal transduction pathways involving second messengers?
[ "sensory receptor", "axons", "catayst cells", "optic nerves" ]
A
medmcqa
medmcqa_05_00521
The Burrows in scabies is in the –
[ "Stratum basale", "Stratum granulosum", "Stratum corneum", "Dennis" ]
C
Mite burrows into stratum corneum. These burrow is visible clinically as an irregular gray - brown line.
math_qa
mathqa_03_04968
the price of a t . v . set worth rs . 15000 is to be paid in 20 installments of rs . 1500 each . if the rate of interest be 6 % per annum , and the first installment be paid at the time of purchase , then the value of the last installment covering the interest as well will be ?
[ "29997", "28088", "13500", "19000" ]
C
"money paid in cash = rs . 1500 balance payment = ( 15000 - 1500 ) = rs . 13500 . answer : c"
medmcqa
medmcqa_05_01379
A year old degbest 'nate presents with fullness of Alt upper quad, a of abdomen. Her medical histoi ant tor type 2 diabetes mellitus f /1
[ "Non-alcoholic steatohepatitis", "Peliosis hepatis", "Autoimmune hepatitis", "Primary biliary sclerosis" ]
A
Ans. a. Non-alcoholic steatohepatitis
openbookqa
obqa_02_03745
If you want to study a flower closely, use
[ "an enlarger", "a fork", "a mirror", "a telescope" ]
A
microscope is used to see small things by making them appear bigger
math_qa
mathqa_03_00158
a box contains 9 pairs of shoes ( 18 shoes in total ) . if two shoes are selected at random , what it is the probability that they are matching shoes ?
[ "1 / 190", "1 / 17", "1 / 19", "1 / 10" ]
B
"the problem with your solution is that we do n ' t choose 1 shoe from 18 , but rather choose the needed one after we just took one and need the second to be the pair of it . so , the probability would simply be : 1 / 1 * 1 / 17 ( as after taking one at random there are 17 shoes left and only one is the pair of the fir...
math_qa
mathqa_03_04188
what will be the compound interest on a sum of rs . 25,000 after 3 years at the rate of 12 p . c . p . a ?
[ "rs . 10111.00", "rs . 10123.20", "rs . 10123.00", "rs . 10100.00" ]
B
"= rs . ( 25000 x ( 1 + 12 / 100 ) ³ = rs . ( 25000 x 28 / 25 x 28 / 25 x 28 / 25 ) = rs . 35123.20 . c . i = rs ( 35123.20 - 25000 ) = rs . 10123.20 answer : b"
medmcqa
medmcqa_05_01527
Human fibroblast cell line is used for cultivation of -
[ "Adenovirus", "Poliovirus", "HIV", "Measles" ]
B
Human diploid fibroblasts (HDF) cell line is used for cultivation of coxsackie A7, 9, 16; CMV; Echovirus; enteroviruses; HSV-1, 2; Poliovirus; parainfluenza virus, rhinovirus and VZV.
ARC-Easy
arc_04_01013
Which is a process that most likely formed the Appalachian Mountains found in the eastern part of North America?
[ "earthquake", "folded rock", "plate tectonics", "volcanic activity" ]
C
null
openbookqa
obqa_02_01207
When something is condensed
[ "it is made into a wetter form", "it is a liquid lake", "it becomes molten liquid", "it is damp inside" ]
A
condensing causes a liquid to form
medmcqa
medmcqa_05_00299
The regulating enzyme in heme synthesis is
[ "ALA synthase", "ALA dehydratase", "Ferrochelatase", "Protoporphyrin" ]
A
(ALA synthase) (276-Lippencott's 3rd) (210- U.S.3rd)Biosynthesis of heme - The major sites of heme biosynthesis are the liver, which synthesizes a number of heme proteins (particularly, cytochrome P450) and the erythrocyte-producing cells of the bone marrow, which are active in hemoglobin synthesis.* ALA-synthase is th...
ARC-Challenge
arc_04_02193
Based on their locations in the periodic table, which element has chemical properties most similar to those of calcium, Ca?
[ "beryllium, Be", "potassium, K", "titanium, Ti", "yttrium, Y" ]
A
null
sciq
sciq_01_04935
How can you prevent your ice cream from getting a sandy texture?
[ "by adding oil", "by using fructose", "by using lowfat milk", "by adding salt" ]
B
Fructose, a sugar found in fruit, contains only carbon, oxygen, and hydrogen. It is used in ice cream to prevent a sandy texture. Complete combustion of 32.4 mg of fructose in oxygen produced 47.6 mg of CO2 and 19.4 mg of H2O. What is the empirical formula of fructose? 11. Coniine, the primary toxin in hemlock, contain...
math_qa
mathqa_03_03955
on a sum of money , the simple interest for 2 years is rs . 320 , while the compound interest is rs . 340 , the rate of interest being the same in both the cases . the rate of interest is
[ "15 %", "14.25 %", "12.5 %", "10.5 %" ]
C
explanation : - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - solution 1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -...
sciq
sciq_01_11269
What is a thin layer of bacteria that sticks to a surface?
[ "a biolfilm", "a spicule", "a choanocyte", "a monofilm" ]
A
A biofilm is a thin layer of bacteria that sticks to a surface. Cells in a biofilm are all alike, but they may play different roles, such as taking in nutrients or making the “glue” that sticks the biofilm to the surface. The sticky plaque that forms on teeth is a biofilm of bacterial cells.
sciq
sciq_01_01503
Alpha, beta, and gamma emissions are associated with what kind of energy?
[ "electrical", "potential", "kinetic", "radiation" ]
D
Alpha, beta, and gamma emissions have different abilities to penetrate matter. The relatively large alpha particle is easily stopped by matter (although it may impart a significant amount of energy to the matter it contacts). Beta particles penetrate slightly into matter, perhaps a few centimeters at most. Gamma rays c...
math_qa
mathqa_03_02329
in a fuel station the service costs $ 1.75 per car , every liter of fuel costs 0.75 $ . assuming that a company owns 12 cars and that every fuel tank contains 55 liters and they are all empty , how much money total will it cost to fuel all cars ?
[ "320 $", "420 $", "490 $", "516 $" ]
D
12 * 1.75 + 0.75 * 12 * 55 = 516 hence - d
sciq
sciq_01_11054
What is most often the cause of encephalitis?
[ "bacterial infections", "viruses", "calcium buildup", "parasites" ]
B
Encephalitis is a brain infection most often caused by viruses. The immune system tries to fight off a brain infection, just as it tries to fight off other infections. But sometimes this can do more harm than good. The immune system’s response may cause swelling in the brain. With no room to expand, the brain pushes ag...
sciq
sciq_01_01738
In what process is atp created by glycolysis, without oxygen?
[ "fermentation", "sedimentation", "condensation", "oxidation" ]
A
Two different pathways accomplish the regeneration of NAD + with rather famous products: lactic acid (C 3 H 6 O 3 ) and ethyl alcohol (C 2 H 6 O) ( Figure above ). Making ATP in the absence of oxygen by glycolysis alone is known as fermentation . Therefore, these two pathways are called lactic acid fermentation and alc...
sciq
sciq_01_06203
When matter recycles and changes state what does it gain or lose by doing so?
[ "density", "volume", "energy", "fuel" ]
C
Matter can exist in one of several different states, including a gas, liquid, or solid state. States of matter differ in the amount of energy their molecules have. When matter recycles, it changes state by gaining or losing energy.
ARC-Challenge
arc_04_02809
Ice will form on small ponds when the temperature drops below 0°C. Which property of ice is most beneficial to fish living in these ponds?
[ "Ice has a temperature colder than the temperature of water.", "Ice absorbs sunlight that is reflected by water.", "Ice traps more pollution than is trapped by water.", "Ice had a density lower than the density of water." ]
D
null
sciq
sciq_01_10686
In what type of population do allele and genotype frequencies not change over time?
[ "inequilibrium population", "shape population", "saturation population", "equilibrium population" ]
D
In an equilibrium population, allele and genotype frequencies do not change over time.
sciq
sciq_01_02758
Some microorganisms can digest cellulose, breaking it down into what?
[ "gluclose polymers", "fructose polymers", "fructose monomers", "glucose monomers" ]
D
math_qa
mathqa_03_02665
at a florist shop on a certain day , all corsages sold for either $ 20 or $ 30 . if 8 of the corsages that sold for $ 30 had instead sold for $ 20 , then the store ' s revenue from corsages that day would have been reduced by 35 percent . what was the store ' s actual revenue from corsages that day ?
[ "$ 320", "$ 400", "$ 600", "$ 800" ]
A
i am doing it elaborately , hope it will help you . let , no . of corsages @ $ 20 = x , no . of corsages @ $ 30 = y and revenue = r so , 20 x + 30 y = r . . . . . . . . . ( 1 ) now , given the situation , 20 ( x + 8 ) + 30 ( y - 8 ) = r - . 25 r = > 20 x + 160 + 30 y - 240 = . 75 r = > 20 x + 30 y = . 75 r + 80 . . . ....
ARC-Challenge
arc_04_02852
A student pushes a shopping cart filled with groceries. The cart has a mass of 12 kilograms (kg). The student pushes the cart with a force of 15 newtons (N). Assuming the ground is frictionless, how fast will the cart accelerate until the student stops applying the force?
[ "0.625 m/s^2", "0.8 m/s^2", "1.25 m/s^2", "2.5 m/s^2" ]
C
null
medmcqa
medmcqa_05_03892
Hot water bottle relieves the pain of abdominal spasm by
[ "Stimulation of adrenergic fibers", "Stimulation of cholinergic fibers", "Inhibition of cold receptors", "Inhibition of heat receptors" ]
A
Pain from gastrointestinal viscera is carried by small C fibers. Temperature sensation from hot water bottles passes through A fibers and large C fibers. When these larger fibers are stimulated, they block the adrenergic small C fibers from the viscera.
sciq
sciq_01_02677
Unlike ammonia, oxygen cannot be liquefied at room temperature because its what is below room temperature?
[ "relaxed temperature", "critical temperature", "leading temperature", "particular temperature" ]
B
Check Your Learning Ammonia can be liquefied by compression at room temperature; oxygen cannot be liquefied under these conditions. Why do the two gases exhibit different behavior? Answer: The critical temperature of ammonia is 405.5 K, which is higher than room temperature. The critical temperature of oxygen is below ...
sciq
sciq_01_06106
What is the second most common skin cancer?
[ "squamous cell carcinoma", "melanoma", "precancerous cell carcinoma", "basal cell carcinoma" ]
A
Squamous Cell Carcinoma Squamous cell carcinoma is a cancer that affects the keratinocytes of the stratum spinosum and presents as lesions commonly found on the scalp, ears, and hands (Figure 5.19). It is the second most common skin cancer. The American Cancer Society reports that two of 10 skin cancers are squamous ce...
math_qa
mathqa_03_04422
a can do a piece of work in 4 days . b can do it in 6 days . with the assistance of c they completed the work in 2 days . find in how many days can c alone do it ?
[ "87 days", "12 days", "66 days", "77 days" ]
B
c = 1 / 2 - 1 / 4 - 1 / 6 = 1 / 12 = > 12 days answer : b
openbookqa
obqa_02_03525
Prolonged sweating in hot weather means
[ "your going to change into a new animal", "you're ready to travel through time", "you are going to fill a swimming pool", "your organs are unable to get replenished" ]
D
if an organism becomes too hot then that organism may die
openbookqa
obqa_02_03588
wind is used for producing
[ "cupcakes", "smores", "excited particle flowing", "plants" ]
C
wind is used for producing electricity
ARC-Easy
arc_04_01568
Which of the following is the major cause of tides?
[ "heating of the oceans by the Sun", "gravitational pull of the Moon", "earthquakes on the ocean floor", "changes in wind direction" ]
B
null
math_qa
mathqa_03_02844
two trains of length 100 m and 200 m are 100 m apart . they start moving towards each other on parallel tracks , at speeds 54 kmph and 36 kmph . in how much time will the trains cross each other ?
[ "12 sec", "13 sec", "15 sec", "16 sec" ]
D
"d relative speed = ( 54 + 36 ) * 5 / 18 = 5 * 5 = 25 mps . the time required = d / s = ( 100 + 100 + 200 ) / 25 = 400 / 25 = 16 sec ."
sciq
sciq_01_00107
What does lattice energy of an ionic solid measure the strength of?
[ "bonds", "electrons", "metals", "atoms" ]
A
Lattice energy of an ionic solid is a measure of the strength of bonds in that ionic compound.
math_qa
mathqa_03_00206
in a graduating class of 232 students , 144 took geometry and 119 took biology . what is the difference between the greatest possible number t and the smallest possible number of students that could have taken both geometry and biology ?
[ "144", "119", "113", "88" ]
D
"official solution : first of all , notice that since 144 took geometry and 119 took biology , then the number of students who took both geometry and biology can not be greater than 119 . { total } = { geometry } + { biology } - { both } + { neither } ; 232 = 144 + 119 - { both } + { neither } ; { both } = 31 + { neith...
openbookqa
obqa_02_04909
During a vigorous workout which will need to increase?
[ "Balance", "Pulse", "Perspiration", "Strength" ]
B
as energy required for an activity increases , pulse will increase
math_qa
mathqa_03_02743
the age of father 7 years ago was 5 times the age of his son . 5 years hence , father ' s age will be thrice that of his son . the ratio of their present ages is :
[ "67 : 19", "65 : 17", "61 : 19", "63 : 15" ]
A
let the ages of father and son 7 years ago be 5 x and x years respectively . then , ( 5 x + 7 ) + 5 = 3 [ ( x + 7 ) + 5 ] 5 x + 12 = 3 x + 36 x = 12 . required ratio = ( 5 x + 7 ) : ( x + 7 ) = 67 : 19 . answer : option a
sciq
sciq_01_02300
Which effect causes winds to strike the polar front at an angle?
[ "Lake Effect", "centrifugal effect", "coriolis effect", "axial tilt" ]
C
Mid-latitude cyclones form at the polar front. Two very different air masses blow past each other in opposite directions. The Coriolis effect causes winds to strike the polar front at an angle. Warm and cold fronts form next to each other.
ARC-Challenge
arc_04_02954
A student plants rosebushes in her front yard. The student is frequently seen pulling weeds from the base of the rosebushes. What is the most likely reason that the weeds are pulled?
[ "Weeds add fertilizer to the soil.", "Weeds use nutrients the roses need to grow.", "Weeds increase the bacteria in the soil.", "Weeds consume most of the oxygen." ]
B
null
ARC-Easy
arc_04_00803
Which of these describes a chemical change?
[ "water freezing", "paper burning", "water becoming steam", "paper being torn" ]
B
null
math_qa
mathqa_03_02823
total dinning bill for 5 people was $ 211.00 . if they add 15 % tip and divided the bill evenly , approximate . what was each persons find share
[ "$ 30.14", "48.53", "34.66", "32.29" ]
B
"211 * 15 = 3165 / 100 = 31.65 211 + 31.65 = 242.65 242.65 / 5 = 48.53 answer : b"
openbookqa
obqa_02_01477
A chemical change is likely to happen in which body part?
[ "stomach", "heart", "leg", "ear" ]
A
An example of a chemical change is acid breaking down substances
sciq
sciq_01_06774
What kinds of waves are composed of various oscillating electric and magnetic fields?
[ "elastic", "seismic", "electromagnetic", "tidal" ]
C
Figure 27.45 illustrates how the component of the electric field parallel to the long molecules is absorbed. An electromagnetic wave is composed of oscillating electric and magnetic fields. The electric field is strong compared with the magnetic field and is more effective in exerting force on charges in the molecules....
math_qa
mathqa_03_04360
in a race of 1000 m , a can beat by 100 m , in a race of 800 m , b can beat c by 100 m . by how many meters will a beat c in a race of 800 m ?
[ "122.9 m", "170 m .", "122.2 m", "222.9 m" ]
B
"when a runs 1000 m , b runs 900 m and when b runs 800 m , c runs 700 m . when b runs 900 m , distance that c runs = ( 900 * 700 ) / 800 = 6300 / 8 = 787.5 m . in a race of 1000 m , a beats c by ( 1000 - 787.5 ) = 212.5 m to c . in a race of 800 m , the number of meters by which a beats c = ( 800 * 212.5 ) / 1000 = 170...
sciq
sciq_01_10805
Corals build hard exoskeletons that grow to become coral what?
[ "reefs", "beds", "layers", "crystals" ]
A
Cnidarians are aquatic invertebrates in Phylum Cnidaria. They include jellyfish and corals, both of which have radial symmetry. All cnidarians have nematocysts, and many are bioluminescent. They may exist in medusa and/or polyp form. Corals build hard exoskeletons that grow to become coral reefs.
math_qa
mathqa_03_03667
a 40 - liter solution of alcohol and water is 5 percent alcohol . if 3.5 liters of alcohol and 6.5 liters of water are added to this solution , what percent of the solution produced is alcohol ?
[ "8 %", "11 %", "14 %", "17 %" ]
B
"the percent of alcohol in the solution is ( 0.05 ( 40 ) + 3.5 ) / 50 = 5.5 / 50 = 11 % the answer is b ."
sciq
sciq_01_03798
What do you call the system of glands that release chemical messenger molecules into the bloodstream?
[ "homeostasis system", "endocrine system", "nervous system", "limbic system" ]
B
The nervous system isn’t the only message-relaying system of the human body. The endocrine system also carries messages. The endocrine system is a system of glands that release chemical messenger molecules into the bloodstream. The messenger molecules are hormones. Hormones act slowly compared with the rapid transmissi...
sciq
sciq_01_08569
The calvin cycle and light reactions are the two stages of what process?
[ "evaporation", "condensation", "cell growth", "photosynthesis" ]
D
Photosynthesis occurs in two stages, called the light reactions and the Calvin cycle. Figure below sums up what happens in these two stages. Both stages are described below.
sciq
sciq_01_11391
Why do adult herbivores in a herd surround their young?
[ "to show them love", "to protect them from other adult herbivores", "to protect them as they are vulnerable to predators", "to keep them warm on long cold nights" ]
C
Herbivores such as zebras and elephants live in herds . Adults in the herd surround and protect the young, who are most vulnerable to predators.
math_qa
mathqa_03_01128
a train running at the speed of 60 km / hr crosses a pole in 12 seconds . find the length of the train .
[ "150", "278", "179", "200" ]
D
": speed = 60 * ( 5 / 18 ) m / sec = 50 / 3 m / sec length of train ( distance ) = speed * time ( 50 / 3 ) * 12 = 200 meter answer : d"
sciq
sciq_01_06442
What process moves food through the esophagus no matter which position the body is in?
[ "mastication", "peristalsis", "homeostasis", "proteolysis" ]
B
Some people think that gravity moves food through the esophagus. If that were true, food would move through the esophagus only when you are sitting or standing upright. In fact, because of peristalsis, food can move through the esophagus no matter what position you are in—even upside down! Just don’t try to swallow foo...
math_qa
mathqa_03_01459
a motorcyclist started riding at highway marker a , drove 120 miles to highway marker b , and then , without pausing , continued to highway marker c , where she stopped . the average speed of the motorcyclist , over the course of the entire trip , was 20 miles per hour . if the ride from marker a to marker b lasted 3 t...
[ "40", "135", "50", "55" ]
B
a - b = 120 miles b - c = 60 miles avg speed = 20 miles time taken for a - b 3 t and b - c be t avg speed = ( 120 + 60 ) / total time 20 = 180 / 4 t t = 135 b - c = 135 mph answer b
math_qa
mathqa_03_03111
the average of 11 results is 20 . the average of first 5 of them is 15 and that of last 5 is 22 . find the 6 th result ?
[ "35", "50", "100", "120" ]
A
"6 th result = sum of 11 results - sum of 10 results = 11 * 20 - 5 * 15 - 5 * 22 = 220 - 75 - 110 = 35 answer is a"
ARC-Easy
arc_04_00502
Which group of organisms would all be found living in a tropical rain forest?
[ "Lizards, insects, cacti, kangaroos", "Vines, palm trees, tree frogs, monkeys", "Evergreens, moose, weasels, mink", "Lichens, mosses, caribou, polar bears" ]
B
null
medmcqa
medmcqa_05_03037
Chyme is formed by
[ "Esophagus", "Stomach", "Duodenum", "Jejunum" ]
B
Stomach the semifluid, homogeneous, creamy or gruel- like material produced by action of the gastric juice on ingested food in the stomach Ref: guyton and hall textbook of medical physiology 12th edition page number:395,396,397
ARC-Easy
arc_04_00184
As the hawk population increases in an ecosystem, the deer mouse population will most likely decrease as a result of
[ "decrease in food source.", "increase in disease.", "increase in predators.", "decrease in habitat." ]
C
null
sciq
sciq_01_01234
Water molecules are polar, so they form what type of bonds?
[ "helium", "oxygen", "hydrogen", "carbon" ]
C
Water molecules are polar, so they form hydrogen bonds. This gives water unique properties, such as a relatively high boiling point, high specific heat, cohesion, adhesion and density.
sciq
sciq_01_03524
All the genes in all the members of a population make up its what?
[ "diversity", "gene pool", "longevity", "phenotype" ]
B
A population is a group of organisms of the same species that live in the same area. All the genes in all the members of a population make up the population’s gene pool . For each gene, the gene pool includes all the different alleles in the population. The gene pool can be described by its allele frequencies for speci...
sciq
sciq_01_03559
How do autotrophs get food?
[ "make their own", "Soak up from host cell", "From Water", "From Plant matter" ]
A
Autotrophs make their own food. Heterotrophs get food by eating other living things.
sciq
sciq_01_07182
Size is a general feature of cell structure that relates to?
[ "activation", "timing", "function", "instance" ]
C
math_qa
mathqa_03_02791
the s . i . on a certain sum of money for 6 years at 14 % per annum is half the c . i . on rs . 7000 for 2 years at 7 % per annum . the sum placed on s . i . is ?
[ "603.75", "555.75", "569.55", "256.25" ]
A
c . i . = [ 7000 * ( 1 + 7 / 100 ) 2 - 7000 ] = ( 7000 * 11 / 10 * 11 / 10 - 7000 ) = rs . 1014.3 . sum = ( 507.15 * 100 ) / ( 6 * 14 ) = rs . 603.75 answer : a
math_qa
mathqa_03_00756
in a group of people , if 30 people were made to stand in each column , 16 columns could be formed . if 48 people were made to stand in a column , how many columns could be formed ?
[ "10", "12", "14", "16" ]
A
16 * 30 = 48 * n n = 10 the answer is a .
ARC-Challenge
arc_04_02838
Based on the Doppler effect, the electromagnetic waves reaching Earth from a galaxy that is moving away from Earth would be expected to
[ "experience an increase in their amplitude.", "experience an increase in frequency.", "experience a decrease from transverse waves to longitudinal waves.", "experience a decrease in frequency." ]
D
null
ARC-Easy
arc_04_00165
One key physical process in beach formation is wave action. Sand is deposited on beaches as waves break onto the shoreline and the energy from the wave scatters. Which type of energy is most used by wave action to modify the shape of the beaches?
[ "thermal", "potential", "chemical", "mechanical" ]
D
null
sciq
sciq_01_04961
What is the master gland of the endocrine system?
[ "Hypothyroid", "Thymus", "pituitary gland", "Thyroid" ]
C
The hypothalamus is part of the brain and also secretes hormones, thus connecting the nervous and endocrine systems. The pituitary gland is the master gland of the endocrine system and controls other endocrine glands. Endocrine glands also include the thyroid gland, adrenal glands, pancreas, and gonads.