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 organ has finger like outgrowths which are called as Villi (Singular Villus)?
Which of the following is NOT a constituent of xylem?
Which component in tobacco makes it harmful for human consumption?
Which one of the following is a water soluble vitamin?