Read the following statements regarding the structure of a mature human sperm: I. The whole body of the sperm is enveloped by a cell wall. II. The sperm head contains an elongated diploid nucleus. III. The acrosome is filled with enzymes that help in fertilisation of the ovum. IV. The middle piece possesses numerous mitochondria which produce energy for motility. How many of the above statements are incorrect?

Step-by-step solution

Statement I is incorrect because the whole body of a human sperm is enveloped by a plasma membrane, not a cell wall (animal cells lack a cell wall). Statement II is incorrect because the sperm head contains an elongated haploid nucleus, not a diploid one, as it is a male gamete formed after meiosis. Statements III and IV are correct descriptions according to standard human reproductive anatomy. The acrosome contains hydrolytic enzymes for fertilisation, and the middle piece contains numerous mitochondria to provide