Which are the special proteins in muscles that contract and relax to cause movement?
Which one of the following forms the base of vegetable fibres?
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Which among the following do NOT have a perfect pair of sex chromosomes?
The saliva in human beings contains which enzyme?
The smallest blood vessels which are one-cell thick, are called ______.
Hepatitis affects which organ of the human body?
Leptospirosis is a disease caused by
Webbed neck is a characteristic of
Which of the following is an emergency hormone in humans?