question_answer

Give any four reasons which cause infertility in males.

Or

It is often seen that pollen grains are produced in an enormous quantity in maize. Justify.

Answer:

Infertility in males can be due to

· Low semen quality.

· Oligospermia (low sperm count).

· Azospermia (absence of sperms).

· Cryptorchidism (hidden testis).

Or

The pollination in maize is carried out by wind, i.e. anemophily. Hence, it releases large number of pollen grains to ensure fertilisation. The pollen grains are small, light, dry, dusty, non-sticky and sometimes winged for easy travelling through wind.