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7.76k
openbookqa
obqa_02_02396
A person wanting to signal with light could redirect sunlight with
[ "a shoe", "a steel dish", "a teabag", "a cat" ]
B
a mirror reflects light
sciq
sciq_01_02652
When a soluble compound dissolves, its constituent atoms, molecules, or ions disperse throughout what?
[ "solvent", "liquid", "pigment", "gel" ]
A
When a soluble compound dissolves, its constituent atoms, molecules, or ions disperse throughout the solvent. In contrast, the constituents of an insoluble compound remain associated with one another in the solid. A soluble compound is a strong electrolyte if it dissociates completely into ions, a weak electrolyte if i...
openbookqa
obqa_02_04169
An item that might have more tightly packed matter is
[ "helium", "gold", "orange juice", "wood" ]
B
matter with variable volume and shape assumes the shape and size of its entire container
medmcqa
medmcqa_05_02986
Dangerous area of scalp is -
[ "Superficialfacia", "Aponeurosis", "Subaponeurotic tissue", "Pericranium" ]
C
Ans. is 'c' i.e., Subaponeurotic tissueo The scalp is soft tissue which covers the calvaria of skull. It consists of five layers and can be memorised by a mnemonic using the initial letters of the word. SCALPa) Skinb) Close network of connective tissue (superficial fascia)c) Aponeurosis (galea aponeurotica) with occipi...
medmcqa
medmcqa_05_01833
Very low bih weight is less than:September 2009, March 2013 (g)
[ "1000 gm", "1500 gm", "2000 gm", "2500 gm" ]
B
Ans. B: 1500 gmVery low bihweight is a term used to describe babies who are born weighing less than 1,500 grams.
medmcqa
medmcqa_05_04351
The incubation period of Sarcoptes scabie is?
[ "1-2 weeks", "2-3 weeks", "3-4 weeks", "4-5 weeks" ]
D
Ans. is 'd' i.e., 4-5 weeks The incubation period of scabies * The incubation period is 4-6 weeks before itching begins. Usually, there is no itching in the first four to six weeks of contracting the infection because the itching is due to the development of sensitization (Hypersensitivity) to some of the products (Sal...
math_qa
mathqa_03_01867
how many positive integers less than 60 have a reminder 01 when divided by 4 ?
[ "13", "14", "15", "16" ]
C
"1 also gives the remainder of 1 when divided by 4 . so , there are total of 15 numbers . answer : c ."
ARC-Easy
arc_04_01882
Which of the following causes a chemical change?
[ "sugar added to soda", "detergent added to water", "lemon juice added to milk", "salt added to water" ]
C
null
medmcqa
medmcqa_05_02762
Most common cause of cervical insufficiency is
[ "Idiopathic", "Previous dilatation", "Exposure to DES", "Conization" ]
A
The most common cause of cervical insufficiency is idiopathicCervical incompetence may be congenital due to the following:Mullerian anomaliesCollagen disordersExposure to DES or the causes may be acquiredObstetric trauma like cervical laceration during deliveryMechanical dilatationCervical Conization
sciq
sciq_01_02329
The skin plays an important role in preventing the escape of what commonly found liquid from the body?
[ "stomach acid", "hormones", "urine", "water" ]
D
The skin has multiple roles in the body. Many of these roles are related to homeostasis. The skin’s main functions are preventing water loss from the body and serving as a barrier to the entry of microorganisms. In addition, melanin in the skin blocks UV light and protects deeper layers from its damaging effects.
ARC-Easy
arc_04_01173
Which is most likely a cancer treatment?
[ "a drug that kills only very small cells", "a drug that kills only very large cells", "a drug that kills only slowly dividing cells", "a drug that kills only rapidly dividing cells" ]
D
null
medmcqa
medmcqa_05_04455
"Vital Layer" in slow sand filter is:
[ "Sand bed", "Zoological layer", "Supernatan", "Under drainage layer" ]
B
Zoological layer
openbookqa
obqa_02_03409
Bears instinctively know when its time to hibernate because who passes it on to them?
[ "soup", "their pants", "Their parents", "porridge" ]
C
hibernation is an inherited behavior
openbookqa
obqa_02_04757
The usual kind of weather in a location is called what?
[ "warmth", "fog", "zone conditions", "visibility" ]
C
climate is the usual kind of weather in a location
openbookqa
obqa_02_00954
A hot liquid would be
[ "an old cup of coffee", "a tall glass of milk", "pasta water bubbling on the stove", "a warm cup of cocoa" ]
C
if liquid is boiling then that liquid is hot
sciq
sciq_01_06765
What do extensive properties depend on the amount of?
[ "matter in a sample", "sample temperature", "experimental controls", "independent variables" ]
A
Normally, electric charge is transferred when electrons leave the outer orbits of the atoms of one body (leaving it positively charged) and move to the surface of another body (causing the new surface to gain a negative net charge). In a plasma all electrons are stripped from the atoms, leaving positively charged ions ...
sciq
sciq_01_06061
Arthropods change into the adult form in a process called what?
[ "parthenogenesis", "metamorphosis", "spontaneous mutation", "budding" ]
B
Arthropods have a life cycle with sexual reproduction. Most species go through larval stages after hatching. The larvae are very different from the adults. They change into the adult form in a process called metamorphosis . This may take place within a cocoon. A familiar example of metamorphosis is the transformation o...
math_qa
mathqa_03_02432
the average ( arithmetic mean ) of 20 , 40 , and 60 is 4 more than the average of 10 , 70 , and what number ?
[ "28", "25", "35", "45" ]
A
"a 1 = 120 / 3 = 40 a 2 = a 1 - 4 = 36 sum of second list = 36 * 3 = 108 therefore the number = 108 - 80 = 28 answer : a"
sciq
sciq_01_07137
What are temporary feet that protists have called?
[ "transient pseudopodia", "spontaneous pseudopodia", "pedicules", "temporary flagella" ]
A
Other protists have what are called transient pseudopodia , which are like temporary feet. The cell surface extends out to form feet-like structures that propel the cell forward. An example of a protist with pseudopodia is the amoeba.
medmcqa
medmcqa_05_03681
Hegar sign is seen earliest at:
[ "8 weeks", "12 week", "14 week", "15 week" ]
A
Ans. (a) 8 weeksRef. D. C Dutta 7th Ed. /65The pelvic changes during pregnancy are divers and appear different at different periods:SignsAt AOGPalmer's sign: Regular and rhythmic uterine contraction4-8 weeksVaginal sign: softened vaginal wall with copious mucoid discharge6th weekGoodell's sign: cervix feels soft and co...
sciq
sciq_01_00893
What type of properties are characteristics that describe matter?
[ "thermal", "invisible", "physical", "visible" ]
C
The properties that chemists use to describe matter fall into two general categories. Physical properties are characteristics that describe matter. They include characteristics such as size, shape, color, and mass. Chemical properties are characteristics that describe how matter changes its chemical structure or compos...
sciq
sciq_01_10977
What is the smallest unit of structure and function of all living organisms?
[ "particle", "atom", "cell", "proton" ]
C
The cell is the smallest unit of structure and function of all living organisms. But this smallest of units still performs some very complex processes. In fact, for some organisms, just one cell must do everything necessary for life.
sciq
sciq_01_10392
Metabolism includes both anabolic and which other reaction?
[ "catabolic", "organic", "biogenic", "enzymatic" ]
A
Figure 1.6 Metabolism Anabolic reactions are building reactions, and they consume energy. Catabolic reactions break materials down and release energy. Metabolism includes both anabolic and catabolic reactions.
medmcqa
medmcqa_05_01455
Best substitute of esophagus after esophagectomy is:
[ "Stomach", "Jejunum", "Left colon", "Right colon" ]
A
Answer is A (Stomach) After a poion of esophagus is removed, or after complete esophagectomy, a conduit must be establishedfbr alimentary continuity. The stomach, colon and jejunum have all been successfully used a esophageal substitutes but the Stomach appears to be the 'conduit' of choice because of ease in mobilizat...
medmcqa
medmcqa_05_01977
Coagulative necrosis is seen in A/E -
[ "M.I.", "T.B.", "Thermal", "Zenker's degeneration" ]
B
Ans. is (B) Tuberculosis Coagulative necrosis: Coagulative necrosis typically occurs in ischemic injury to solid organs such as kidney, heart (myocardium) and adrenal gland. It is also seen with other types & injury e.g. * Coagulative necrosis of liver cells due to viruses or toxic chemicals and coagulative necrosis of...
math_qa
mathqa_03_04641
the side of a square is increased by 5 % then how much % does its area increases ?
[ "15.00 %", "10.25 %", "10.00 %", "12.25 %" ]
B
"a = 100 a 2 = 10000 a = 105 a 2 = 11025 - - - - - - - - - - - - - - - - 10000 - - - - - - - - - 1025 100 - - - - - - - ? = > 10.25 % answer : b"
sciq
sciq_01_02136
The way of learning that involves reward and punishment is called?
[ "pressure", "foolish", "conditioning", "mixed" ]
C
Conditioning is a way of learning that involves a reward or punishment. If you ever trained a dog to obey a command, you probably gave the dog a tasty treat each time he performed the desired behavior. It may not have been very long before the dog would reliably follow the command in order to get the treat. This is an ...
medmcqa
medmcqa_05_03606
A 6-year-old girl presents with precocious puberty, some bony lesions & hyperpigmented skin lesions as shown below. What is the most probable diagnosis?
[ "Prader Willi syndrome", "Laurence Moon syndrome", "Cushing syndrome", "McCune-Albright syndrome" ]
D
d. McCune-Albright syndromePrecocious puberty, polyostotic fibrous dysplasia & cafe au lait spots are features of McCune Albright syndrome
math_qa
mathqa_03_02700
a certain quantity of 40 % solution is replaced with 25 % solution such that the new concentration is 35 % . what is the fraction of the solution that was replaced ?
[ "1 / 4", "1 / 3", "1 / 2", "2 / 3" ]
B
"original quantity = a substituted quantity = b then : ( a * 0.4 + 0.25 * b т а у 0.4 * b ) / a = 0.35 0.4 + ( b / a ) * ( - 0.15 ) = 0.35 b / a = - 0.05 / - 0.15 = 1 / 3 answer : b"
ARC-Easy
arc_04_01055
An atom consists of a nucleus surrounded by
[ "ions.", "protons.", "neutrons.", "electrons." ]
D
null
sciq
sciq_01_03492
What organ is made up of over one million nephrons that dot the renal cortex?
[ "gall bladder", "stomach", "lungs", "kidney" ]
D
Which of the following statements about the kidney is false? a. The renal pelvis drains into the ureter. The renal pyramids are in the medulla. The cortex covers the capsule. Nephrons are in the renal cortex. Because the kidney filters blood, its network of blood vessels is an important component of its structure and f...
sciq
sciq_01_00206
Triggered by changes in the environment, migration and hibernation occur as cycles on what temporal basis?
[ "seasonally", "monthly", "bi-annually", "annual" ]
D
Examples of behaviors with annual cycles include migration and hibernation. Both are innate behaviors. They are triggered by changes in the environment, such as the days growing shorter in the fall.
sciq
sciq_01_04008
Most scientists think that ordinary matter is less than half of the total matter in the universe; the remaining part includes what mysterious entity?
[ "cold matter", "magic matter", "dark matter", "mystery matter" ]
C
Most scientists who study dark matter think it is a combination. Ordinary matter is part of it. That is mixed with some kind of matter that we haven’t discovered yet. Most scientists think that ordinary matter is less than half of the total matter in the universe.
openbookqa
obqa_02_00450
Earth is a similar material as
[ "Mars", "Jupiter", "Neptune", "the sun" ]
A
Earth is made of rock
sciq
sciq_01_08953
Spontaneous reactions release what type of energy, meaning it is available to do work?
[ "free energy", "radioactive energy", "kinetic energy", "potential energy" ]
A
Many chemical reactions and physical processes release energy that can be used to do other things. When the fuel in a car is burned, some of the released energy is used to power the vehicle. Free energy is energy that is available to do work. Spontaneous reactions release free energy as they proceed. Recall that the de...
sciq
sciq_01_08596
Which part of the nephron collects wastes in the blood?
[ "vesicle", "waste sac", "tubule", "filter" ]
C
The part of each nephron called the glomerulus is where blood in the capillaries is filtered. Excess water and wastes are filtered out of the blood. The tubule of the nephron collects these substances. Some of the water is reabsorbed. The remaining fluid is urine.
sciq
sciq_01_01479
In the body, oxygen is used by cells of the body’s tissues and carbon dioxide is produced as what?
[ "oxygen", "fuel", "food", "waste product" ]
D
Gas Exchange across the Alveoli In the body, oxygen is used by cells of the body’s tissues and carbon dioxide is produced as a waste product. The ratio of carbon dioxide production to oxygen consumption is the respiratory quotient (RQ). RQ varies between 0.7 and 1.0. If just glucose were used to fuel the body, the RQ w...
sciq
sciq_01_07492
Electrophiles have a strong tendency to react with what?
[ "neutrons", "resistors", "acids", "nucleophiles" ]
D
Electrophiles have a strong tendency to react with nucleophiles. CONCEPTUAL PROBLEMS.
openbookqa
obqa_02_01060
What is a way to be born besides live birth?
[ "coming through a tough shell", "digging out of the sand", "cooking up an egg", "living in a nest" ]
A
if an animal hatches from an egg then that animal is born
sciq
sciq_01_08675
The brain develops from this early tube structure and gives rise to specific regions of the adult brain. as the neural tube grows and differentiates, it enlarges into three vesicles that correspond to the forebrain, midbrain, and this?
[ "anteriorbrain", "hindbrain", "astrobrain", "rearbrain" ]
B
into the brain, and the posterior region becomes the spinal cord. Tissues at the edges of the neural groove, when it closes off, are called the neural crest and migrate through the embryo to give rise to PNS structures as well as some non-nervous tissues. The brain develops from this early tube structure and gives rise...
medmcqa
medmcqa_05_00981
Tyrosine kinase inhibitors are first line treatment in:
[ "Gastrointestinal stromal tumors", "Receptor mediated neuroendocrine tumors", "Breast cancer", "Renal cell carcinoma" ]
A
lmatinib This novel antineoplastic drug inhibits the tyrosine protein kinases in chronic myeloid leukaemia (CML) cells and the ones that are activated by platelet derived growth factor (PDGF) receptor, stem cell receptor and c-kit receptor found in gastrointestinal stromal tumour (GIST), a rare tumour. Stricking succes...
openbookqa
obqa_02_01681
A river is moving along a path and a piece of paper falls in it. The paper
[ "screams", "flies", "sinks", "relocates" ]
D
flowing liquid can push objects
math_qa
mathqa_03_03053
water boils at 212 ° f or 100 ° c and melts at 32 ° f or 0 ° c . if the temperature of the particular day is 35 ° c , it is equal to
[ "50 ° f", "76 ° f", "95 ° f", "110 ° f" ]
C
let f and c denotes the temparature in fahrenheit anid celcsius respectively . then , ( f - 32 ) / ( 212 - 32 ) = ( c - 0 ) / ( 100 - 0 ) , if c = 35 , then f = 95 . c
medmcqa
medmcqa_05_02385
What is /are components of Nutrition surveillance?
[ "Policy maker", "DOTS", "Nutritional survey", "AFP surveillance" ]
D
Nutrition surveillance: – Main strategy: Detection of malnutrition (nutritional survey) – Approach: Diagnostic-interventional – Sample: Representative, 50 - 100 size group – Objectives: 1. To aid health and development 2. To provide input for program management and evaluation (to policy makers) 3. To give timely warnin...
sciq
sciq_01_07542
What are the only amphibians without legs?
[ "porifera", "caecilians", "crustaceans", "newts" ]
B
Caecilians The caecilian order is the amphibian order with the fewest species. Caecilians are closely related to salamanders. They have a long, worm-like body. They are the only amphibians without legs. Caecilians evolved from a four-legged ancestor but lost their legs later in their evolution. As adults, they often bu...
sciq
sciq_01_02614
What organ contributes about 60% of the volume of semen ?
[ "cilia", "seminal vesicles", "long vesicles", "complete vesicles" ]
B
openbookqa
obqa_02_00321
What does mining change?
[ "temperatures", "biological environments", "water levels", "atmospheric pressures" ]
B
mining changes an ecosystem
sciq
sciq_01_04679
The lungs of mammals are unique in having what?
[ "acini", "alveolar", "alveoli", "glands" ]
C
The lungs of mammals are unique in having alveoli . These are tiny, sac-like structures. Each alveolus is surrounded by a network of very small blood vessels (see Figure below ). Because there are millions of alveoli in each lung, they greatly increase the surface area for gas exchange between the lungs and bloodstream...
math_qa
mathqa_03_04758
the diagonals of a rhombus are 13 cm and 20 cm . find its area ?
[ "176", "130", "150", "179" ]
B
"1 / 2 * 13 * 20 = 130 answer : b"
openbookqa
obqa_02_03194
What is oil likely comprised of?
[ "homo sapiens", "air", "soil", "brontosaurus" ]
D
fossil fuels are formed by dead organisms over time
sciq
sciq_01_07133
Recent fossil evidence has shown that the evolutionary divergence of what group from other land animals was characterized by streamlining and simplifying the digestive system, which allowed a high metabolic rate?
[ "rats", "fish", "marsupials", "birds" ]
D
Avian Adaptations Birds have a highly efficient, simplified digestive system. Recent fossil evidence has shown that the evolutionary divergence of birds from other land animals was characterized by streamlining and simplifying the digestive system. Unlike many other animals, birds do not have teeth to chew their food. ...
sciq
sciq_01_07818
Different forms of the same element are called what?
[ "allotropes", "subclasses", "polymorphs", "amines" ]
A
Graphite is one of three forms of crystalline, or crystal-forming, carbon. Carbon also exists in an amorphous, or “shapeless,” form in substances such as coal and charcoal. Different forms of the same element are called allotropes. Besides graphite, the other allotropes of crystalline carbon are diamond and fullerenes....
sciq
sciq_01_02492
Water seeping into the ground is known as?
[ "precipitation", "invasion", "infiltration", "accumulation" ]
C
Infiltration is the process by which water soaks into the ground. Some of the water may seep deep underground. Some may stay in the soil, where plants can absorb it with their roots.
openbookqa
obqa_02_04561
What weather phenomena can crack your windshield?
[ "condensation", "a gentle breeze", "clouds", "ice precipitation" ]
D
precipitation is when hail fall from clouds to the ground
openbookqa
obqa_02_00576
Seeds can be found inside an object often seen on
[ "Saturday", "Valentine's Day", "April Fool's Day", "Halloween" ]
D
a pumpkin contains seeds
medmcqa
medmcqa_05_02971
In which of the following condition can cause loose body in the joint - ?
[ "RA", "Ankylosing spondylitis", "OA", "SLE" ]
C
Osteoahritis: Is a degenerative bone disease. c/f: Occurs in major joints of lower limbs mostly bilateral. Pain is earliest symptom.initially dull pain and comes on staing an activity after aperiod of restjbut later becomes worse and cramp like,and comes after activity. A coarse crepitus may be there Swelling is a late...
sciq
sciq_01_00870
What helps fungus digest cellulose and other materials found in rotting matter?
[ "soil", "hormones", "carbohydrates", "enzymes" ]
D
Hyphae : These are thread-like strands which interconnect and bunch up into a mycelium ( Figure below ). Ever see mold on a damp wall or on old bread? The things that you are seeing are really mycelia. The hyphae and mycelia help the fungi absorb nutrients from other organisms. Most of the mycelium is hidden from view ...
openbookqa
obqa_02_03909
What can cause a forest fire?
[ "littering cans and food wrappers", "an overheating car engine", "a combination of snow and rain", "sudden electrostatic discharge from a cloud" ]
D
lightning can cause a forest fire
ARC-Easy
arc_04_00615
Discarded electronic devices, such as outdated computers and cell phones, contain materials that can be toxic to the environment. Which statement best explains why humans continue to use these technologies?
[ "Electronics have become less expensive over time.", "Some areas have recycling programs for electronics.", "Industries that produce electronics help the economy.", "Humans value the benefits of these devices over their cost." ]
D
null
openbookqa
obqa_02_02757
If a thing is going to be able to expand, it will require
[ "nutriment", "pipes", "flounder", "conversation" ]
A
an organism requires energy for growth
sciq
sciq_01_02485
Hagfishes have a skull made of what?
[ "cartilage", "gelatin", "chitin", "bone" ]
A
sciq
sciq_01_04497
What holds ionic and covalent compounds together?
[ "gravity", "water", "electrostatic attractions", "magnetic force" ]
C
Ionic and covalent compounds are held together by electrostatic attractions between oppositely charged particles. Describe the differences in the nature of the attractions in ionic and covalent compounds. Which class of compounds contains pairs of electrons shared between bonded atoms?.
sciq
sciq_01_00417
Where are sensors for thermoregulation concentrated in the brain?
[ "the hypothalamus", "pituitary gland", "thyroid", "medulla" ]
A
sciq
sciq_01_02755
What is the tough tissue that contains collagen?
[ "membrane", "cartilage", "fiber", "muscle" ]
B
Another distinguishing feature of vertebrates is an endoskeleton made of bone or cartilage. Cartilage is a tough tissue that contains a protein called collagen. Bone is a hard tissue that consists of a collagen matrix, or framework, filled in with minerals such as calcium. Bone is less flexible than cartilage but stron...
sciq
sciq_01_04421
At high pressures, how are the molecules of a gas crowded?
[ "further apart", "closer together", "small together", "few together" ]
B
Particles of a hypothetical ideal gas have no significant volume and do not attract or repel each other. In general, real gases approximate this behavior at relatively low pressures and high temperatures. However, at high pressures, the molecules of a gas are crowded closer together, and the amount of empty space betwe...
sciq
sciq_01_00089
The activation of what kind of buds induces branching?
[ "axillary buds", "arterial buds", "lymphatic buds", "leafy buds" ]
A
medmcqa
medmcqa_05_01143
Which of the following immunosuppressive agent requires monitoring of renal function on regular basis?
[ "Azathioprine", "Mycophenolate mofetil", "Methotrexate", "Cyclosporine A" ]
D
Ans. is 'd' i.e., Cyclosporine A Cyclosporine:o It is an immunosuppressanto Its immunosuppressive actions are1. Inhibition of T-lymphocyte proliferation 2. Inhibition of IL-2 and other cytokineso Cyclosporine inhibits transcription by binding to a protein called cyclophilin. This complex then inactivates calcineurin. (...
medmcqa
medmcqa_05_04591
Damage to which Brodmann area is responsible for motor aphasia
[ "22", "39", "40", "44" ]
D
Motor aphasia is due to lesion in Broca's area which belong to Brodmann's area 44, (inferior frontal gyrus).
openbookqa
obqa_02_01847
Cycles of day and night occur how often in a day?
[ "5 times", "singular instances", "forty times", "once a year" ]
B
cycles of day and night occur once per day
math_qa
mathqa_03_04236
a train is running at a speed of 4040 km / hr and it crosses a post in 1818 seconds . what is the length of the train ?
[ "190 metres", "160 metres", "200 metres", "120 metres" ]
C
"explanation : speed = 40 km / hr = 40 km / hr = 40 ã — 518 = 1009 m / s = 40 ã — 518 = 1009 m / s time = 18 = 18 seconds distance covered = 1009 ã — 18 = 200 m = 1009 ã — 18 = 200 m therefore , length of the train = 200 m answer is c"
math_qa
mathqa_03_04627
the radius of a semicircle is 7 . what is the approximate perimeter of the semicircle ?
[ "36'", "25'", "15'", "28'" ]
A
perimeter of a circle = 2 pi * r perimeter of a semicircle = pi * r + 2 r aprox perimiter = 3.14 * 7 + 2 * 7 = 35.98 approximately 36 answer a
sciq
sciq_01_03763
There are about 50,000 vertebrate species, and they are placed in how many different classes?
[ "nine", "four", "ten", "three" ]
A
There are about 50,000 vertebrate species, and they are placed in nine different classes. Five of the classes are fish. The other classes are amphibians, reptiles, birds, and mammals. Table below lists some of the distinguishing traits of each class.
math_qa
mathqa_03_03915
a train running at 1 / 2 of its own speed reached a place in 8 hours . how much time could be saved if the train would have run at its own speed ?
[ "8 hrs", "10 hrs", "4 hrs", "15 hrs" ]
C
time taken if run its own speed = 1 / 2 * 8 = 4 hrs time saved = 8 - 4 = 4 hrs answer : c
sciq
sciq_01_03296
Spores are generally produced through what type of reproduction?
[ "hormone", "asexual", "sexual", "similar" ]
C
The lifecycle of basidiomycetes includes alternation of generations (Figure 24.16). Spores are generally produced through sexual reproduction, rather than asexual reproduction. The club-shaped basidium carries spores called basidiospores. In the basidium, nuclei of two different mating strains fuse (karyogamy), giving ...
sciq
sciq_01_01635
What works through chemical reactions that change the rock?
[ "rock weathering", "chemical breakdown", "chemical weathering", "gradual weathering" ]
C
Chemical weathering is different than mechanical weathering. The minerals in the rock change their chemical makeup. They become a different type of mineral or even a different type of rock. Chemical weathering works through chemical reactions that change the rock.
math_qa
mathqa_03_04542
a certain lab experiments with white and brown mice only . in one experiment , 2 / 3 of the mice are white . if there are 14 white mice in the experiment , how many brown mice are in the experiment ?
[ "12", "8", "28", "7" ]
D
let total number of mice = m number of white mice = 2 / 3 m = 14 m = 21 number of brown mice = 1 / 3 m = 1 / 3 * 21 = > brown mice = 7 answer d
sciq
sciq_01_06324
Elongation is the addition of what to the mrna strand?
[ "glycine", "filaments", "nucleotides", "codons" ]
C
Elongation is the addition of nucleotides to the mRNA strand.
sciq
sciq_01_02160
Fruit fly and brine shrimp hox genes have evolved independently for how long?
[ "60.000 million years", "400 million years", "100.32 million years", "one billion" ]
B
ARC-Easy
arc_04_01404
Which object would best help a student determine if a block of an unknown material is magnetic?
[ "wooden ruler", "paper clip", "glass marble", "magnifying glass" ]
B
null
sciq
sciq_01_03250
What kind of path does the energy of an electromagnetic wave take?
[ "fluctuating", "circuitous", "elliptical", "straight line" ]
D
The energy of an electromagnetic wave travels in a straight line along the path of the wave. The moving light wave has associated with it an oscillating electric field and an oscillating magnetic field. Scientists often represent the electromagnetic wave with the image below.
sciq
sciq_01_09707
Acceleration is defined as the change in what over time?
[ "mass", "volume", "direction", "velocity" ]
D
What is the speed of the bird in Exercise 2.4? 6. Acceleration is the change in velocity over time. Given this information, is acceleration a vector or a scalar quantity? Explain. A weather forecast states that the temperature is predicted to be scalar quantity? Explain.
ARC-Challenge
arc_04_02421
On February 21, a student observes that the Moon cannot be seen in the clear night sky. On what date will the student not be able to see the Moon again in the clear night sky?
[ "February 28", "March 7", "March 14", "March 21" ]
D
null
openbookqa
obqa_02_01921
What happens when available water decreases in an environment?
[ "growth", "flooding", "rain", "dry spell" ]
D
drought means available water decreases in an environment
openbookqa
obqa_02_03510
Earthquakes can devastate an area even though they usually last
[ "half an hour", "half a minute", "30 minutes", "20 minutes" ]
B
an earthquake usually occurs over a period of 10 to 30 seconds
sciq
sciq_01_09636
What two factors influence the pressure of fluids?
[ "time and temperature", "depth and density", "temperature and density", "depth and gravity" ]
B
Two factors influence the pressure of fluids. They are the depth of the fluid and its density.
ARC-Challenge
arc_04_02990
Tommy cut his finger. His body needed energy to help heal the cut. Where did the energy come from to heal the cut?
[ "from the bandage he put on the cut", "from the antiseptic cream he put on the cut", "from the food he ate", "from the water he drank" ]
C
null
sciq
sciq_01_10818
What is the process by which plants and animals increase in size?
[ "splicing", "growth", "reproduction", "grafting" ]
B
sciq
sciq_01_03394
Which fuels provide most of the world’s energy?
[ "coal fuels", "fossil fuels", "pattern fuels", "artificial fuels" ]
B
Figure below shows the mix of energy resources used worldwide in 2006. Fossil fuels still provide most of the world’s energy, with oil being the single most commonly used energy resource. Natural gas is used less than the other two fossil fuels, but even natural gas is used more than all renewable energy resources comb...
openbookqa
obqa_02_02774
If a flag is adjusted at great heights
[ "something is pulled", "something is ravaged", "something is burned", "something is gold" ]
A
a pulley is used to lift a flag on a flagpole
sciq
sciq_01_04205
What do we call the scientific study of heredity and hereditary variation?
[ "genetics", "biology", "chemistry", "geneology" ]
A
medmcqa
medmcqa_05_01732
a patient was brought to psychiatry casuality with contraction of the neck , the patient told that it was painul. this symptom staed after the injection given at the psychiatry hospital for his psychosis. the type of side effect caused by the drug is
[ "dystonia", "neuroleptic malignant syndrome", "akathisa", "tardive dyskinesia" ]
A
Acute dystonia * <48 hours of staing antipsychotics * M.C in======Younger black males * If a patient develops dystonia he is more prone for eps Patient considers this as an Allergic reaction , thereby may stop drugs Layryngeal dystonia is a Psychiatric emergency, should be treated with IV lorazepam TREATMENT * Diphenhy...
sciq
sciq_01_06660
When do homologous chromosomes separate and go to different gametes?
[ "after meiosis", "during meiosis", "before meiosis", "during electrolysis" ]
B
During meiosis, homologous chromosomes separate and go to different gametes. Thus, the two alleles for each gene also go to different gametes. At the same time, different chromosomes assort independently. As a result, alleles for different genes assort independently as well. In these ways, alleles are shuffled and reco...
ARC-Challenge
arc_04_02222
What do earthquakes tell scientists about the history of the planet?
[ "Earth’s climate is constantly changing.", "The continents of Earth are continually moving.", "Dinosaurs became extinct about 65 million years ago.", "The oceans are much deeper today than millions years ago." ]
B
null
ARC-Challenge
arc_04_02268
A geologist conducts an investigation to determine the absolute age of a fossil. She then repeats the procedure three times. Which best explains why she repeated the procedure several times?
[ "It helps her develop better procedures.", "It improves the accuracy of the results.", "She wants all the results to be different.", "She has more than one hypothesis to prove." ]
B
null
math_qa
mathqa_03_02988
the average age of an adult class is 50 years . 12 new students with an avg age of 32 years join the class . therefore decreasing the average by 4 years . find what was the original average age of the class ?
[ "10", "12", "42", "20" ]
C
"let original strength = y then , 50 y + 12 x 32 = ( y + 12 ) x 46 â ‡ ’ 50 y + 384 = 46 y + 552 â ‡ ’ 4 y = 168 â ˆ ´ y = 42 c"
sciq
sciq_01_05312
What novelties can also arise when structures that originally played one role gradually acquire a different one?
[ "reproduction", "interactions", "evolutionary", "mutation" ]
C
sciq
sciq_01_08419
The two adrenal glands are glands located just above the what?
[ "kidneys", "esophagus", "lungs", "intestines" ]
A
The two adrenal glands are glands located just above the kidneys. Each adrenal gland has an outer layer (cortex) and inner layer (medulla) that secrete different hormones. The hormone adrenaline is secreted by the inner layer. It prepares the body to respond to emergencies. For example, it increases the amount of oxyge...
sciq
sciq_01_05521
Illnesses caused by bacteria in food are commonly known as what?
[ "chemical poisoning", "the flu", "food poisoning", "viral poisoning" ]
C
Some pathogens spread through food or water. When harmful bacteria contaminate food, they cause foodborne illness, commonly called food poisoning. An example of a pathogen that spreads through water is the protozoan named Giardia lamblia, described in Table above . It causes a disease called giardiasis.
openbookqa
obqa_02_00740
Tiny particles of moisture may be found
[ "in what we all breathe", "under the ocean waves", "exclusively in hot steam", "only in cumulus clouds" ]
A
water vapor is found in the atmosphere
ARC-Challenge
arc_04_02209
In the carbon cycle, carbon moves from reservoir to reservoir as various organic and inorganic processes occur on Earth. Only a small percentage of the global carbon is moved in this cycle each year. The remaining carbon is stored in these reservoirs. Which reservoir contains the greatest amount of stored carbon?
[ "plant biomass", "the atmosphere", "fossil fuels", "the deep ocean" ]
D
null