Classes comprising animals like fishes, amphibians, reptiles, birds along with mammals constitute the category called?
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Who was the first Indian astronomer to calculate the time taken by earth to orbit the sun?
Evidence suggests that life on Earth has existed for about_________________.
The girth of the stem or root in plants increases due to :
Carbon dioxide is produced by all of the following except
A bomb explodes on the moon. You will hear its sound on earth after _________
The major objective of INSAT series of satellites is to facilitate.
To which habitat is the turtle Petri adapted?
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