(a) What is menstruation? Why does menstruation occur?(b) Write the various steps involved in the sexual reproduction in animals.(c) Write the differences between aerobic respiration and anaerobic respiration in tabular form. Name one organism which uses aerobic and another which uses anaerobic mode of respiration.

(a) What is menstruation? Why does menstruation occur?(b) Write the va

1.	(a) What is menstruation? Why does menstruation occur?(b) Write the various steps involved in the sexual reproduction in animals.(c) Write the differences between aerobic respiration and anaerobic respiration in tabular form. Name one organism which uses aerobic and another which uses anaerobic mode of respiration.
Answer» (a) What is menstruation? Why does menstruation occur? (b) Write the various steps involved in the sexual reproduction in animals. (c) Write the differences between aerobic respiration and anaerobic respiration in tabular form. Name one organism which uses aerobic and another which uses anaerobic mode of respiration.