Question

Oestrous cycle is seen in

• A. chimpanzee.
• B. gorilla.
• C. cows.
• D. More than one option is correct

Answer 1

Answer: (C)

The females of placental mammals exhibit cyclical changes in the activities of ovaries and accessory ducts as well as hormones during the reproductive phase. In non-primate mammals like cows, sheep, rats, deers, dogs, tiger, etc., such cyclical changes during reproduction are called oestrus cycle where as in primates (monkeys, apes, and humans) it is called menstrual cycle.