Question

Assertion: In non-primate mammals, cyclical changes that occur during reproduction is called oestrus cycle whereas in primates, it is called the menstrual cycle.
Reason: The females of placental mammals exhibit cyclical changes in the activities of ovaries and accessory ducts as well as hormones during the reproductive phase.

• A. If both assertion and reason are true and the reason is the correct explanation of assertion.
• B. If both assertion and reason are true but the reason is not the correct explanation of assertion.
• C. The assertion is true but the reason is false.
• D. Both assertion and reason are false.

Answer 1

The correct option is A If both assertion and reason are true and the reason is the correct explanation of assertion.

In females of placental mammals, certain cyclical changes occur during the reproductive phase in the ovaries and accessory ducts which are induced by hormones. These changes occur after females attain sexual maturity.
In non-primates, these cyclical changes in the ovaries and accessory ducts is called the oestrus cycle and in primates, it is called menstrual cycle.