Study of classification of organisms is known as _____.
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Equal day/night in both hemispheres is on ________.
Why do the plant closes stomata when it does NOT need carbon dioxide for photosynthesis?
The wilting of plants takes place due to _____.
Plants get their energy to produce food from which of the following?
Which is the coldest planet?
Earth revolves around Sun. Who was the 1st one to present this theory?
Which of the following is a viral disease?