Deficiency of which of the following causes non-clotting of blood?
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Some roots, called _________________, arise from an organ other than the radicle.
Which of the following increases the rate of heart beat?
Fishes have a ........ chambered heart.
Which Vitamin is obtained from Sun rays?
In females, the ovaries are located ______ on each side of the lower abdomen.
The specificity of an antibody is due to
Which one of the following forms the base of vegetable fibres?