Question

The cyclic changes in the activities of ovaries, accessory ducts as well as hormones during the reproductive phase of placental primates and non-primates are called ___ and ___ respectively.

• A. Oestrous cycle and menstrual cycle
• B. Menstrual cycle and oestrus cycle
• C. Oestrous cycle and oestrus cycle
• D. Menstrual cycle and menstrual cycle

Answer 1

The correct option is B

Menstrual cycle and oestrus cycle

In placental mammals, the females show cyclic changes in the activities of ovaries, accessory ducts and hormones throughout their reproductive phase. Such cyclic changes in primates are called menstrual cycle whereas in non-primates oestrous cycle.