For the aquatic organisms, the source of food is
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In a majority of flowering plants, out of the four megaspores, what is the ratio of functional and degenerate megaspores?
Alveoli are balloon like structures within the ______.
In which part of the human body fat is completely digested?
Which of the following is NOT a constituent of xylem?
Which organ has finger like outgrowths which are called as Villi (Singular Villus)?
Which component in tobacco makes it harmful for human consumption?
Which one of the following is a water soluble vitamin?