Question

Each sperm is a single cell.
A. True
B. False

Answer 1

Hint:Sperm is the smallest cell present in the human body. It is the male gamete used in fertilization.


                                     

Complete answer:
 (i) Each sperm is a single cell. Sperm is male gamete that is produced from germ cells.
(ii) They are produced by meiosis which results in unicellular cells that are haploid.
Structure of sperm - It has following parts
(i) Head
(ii) Neck
(iii) Middle piece
(iv) Tail
(v) Plasma membrane envelops the whole body of sperm.
(vi) Head part contains nucleus and the head is covered by a cap-like structure called acrosome (it is filled with enzyme, it helps in fertilization of ovum).
(vii) Middle pieces contain mitochondria which produce energy for the movement of the tail that facilitate sperm motility essential for fertilization.
(viii) Sperms released from seminiferous tubules are transported by the accessory ducts.

Hence the correct answer is option (A) True.

Note:Sperm is a motile structure and fuses with egg. Egg is non-motile and is protected by a layer and allows only a single sperm to fuse with it. Millions of sperms enter the female body at the time of coetus.