A) egg
B) tail
C) ovum
D) spermatozoa
Correct Answer: D
Solution :
Spermatozoa contain a proteinaceous substance known as antifertilizin. It is a protein which is composed of acidic amino acids. Eggs also contain a chemical substance known as fertilizin (Lillie 1919). Later is a glycoprotein which is composed of different types of amino acids and monosaccharides. It has been found that egg fertilizin of any species reacts efficiently with the sperms antifertilizin of the same species.
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