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7.76k
math_qa
mathqa_03_04752
find the area of trapezium whose parallel sides are 28 cm and 20 cm long , and the distance between them is 21 cm ?
[ "288 cm 2", "277 cm 2", "504 cm 2", "510 cm 2" ]
C
"area of a trapezium = 1 / 2 ( sum of parallel sides ) * ( perpendicular distance between them ) = 1 / 2 ( 28 + 20 ) * ( 21 ) = 504 cm 2 answer : c"
sciq
sciq_01_00437
What vesicles store neurotransmitters?
[ "dendritic", "synaptic", "Golgi apparatus", "hydrophobic" ]
B
Secretory Vesicles contain materials that are to be excreted from the cell, such as wastes or hormones . Secretory vesicles include synaptic vesicles and vesicles in endocrine tissues. Synaptic vesicles store neurotransmitters. They are located at presynaptic terminals in neurons. When a signal reaches the end of an ax...
sciq
sciq_01_00491
Gases such as co2 and methane can trap what energy in earth's atmosphere, before radiating it into space?
[ "mechanical energy", "thermal energy", "potential energy", "sunlight energy" ]
B
Thermal energy can be trapped in Earth’s atmosphere by gases such as CO2, water vapor, methane, and chlorofluorocarbons before it can be radiated into space—like the effect of a greenhouse. It is not yet clear how large an increase in the temperature of Earth’s surface can be attributed to this phenomenon. Venus is an ...
openbookqa
obqa_02_02159
The body of creatures may have nutrients delivered to various areas based on where
[ "hair grows", "nails are trimmed", "vessels travel", "birds exist" ]
C
arteries transport nutrients throughout the body
sciq
sciq_01_02189
Which kind of irrigation uses much less water than other methods?
[ "mist", "drip", "constant", "solar" ]
B
Drip irrigation uses much less water than other methods.
sciq
sciq_01_04802
What is the name for a kind of animal that eats a mix of plant and animal foods.
[ "an smorgasbord", "a carnivore", "an herbivore", "an omnivore" ]
D
Some mammals are omnivores. Omnivores are heterotrophs that eat a mix of plant and animal foods. Mammals that are omnivores include bears, foxes, rats, pigs, and human beings. The chimpanzees in Figure below are also omnivorous mammals. In the wild, they eat mainly plant foods, but they supplement plants with birds, bi...
sciq
sciq_01_05668
Producing sperm and secreting testosterone are the main functions of what system?
[ "male reproductive system", "pollination", "female reproductive system", "endocrine system" ]
A
The main functions of the male reproductive system are to produce sperm and secrete testosterone.
ARC-Easy
arc_04_00477
What chemical symbol represents the element iron?
[ "Fe", "I", "Ir", "Pb" ]
A
null
sciq
sciq_01_09864
What kind of lakes form when volcanic eruptions create holes that fill with water?
[ "crater lakes", "novel lakes", "formation lakes", "artificial lakes" ]
A
Other lakes are crater lakes or rift lakes ( Figure below ). Crater lakes form when volcanic eruptions create craters that fill with water. Rift lakes form when movements of tectonic plates create low places that fill with water.