Question

Assertion (A): The placenta is a vital organ during pregnancy, responsible for providing nutrients and oxygen to the developing foetus.

Reason (R): The placenta develops from the fusion of the zygote and the endometrial lining, forming a specilized tissue structure that facilitates the exchange of substances between the maternal and foetal bloodstreams.

1. A is True and R is False.
2. A is False and R is True.
3. Both A and R are True.
4. Both A and R are False.

Options

• (1)

• (2)

• (3)

• (4)

Answer 1

(1)

Explanation:

The placenta is an important organ during pregnancy. It supplies the developing foetus with oxygen and nutrients and also helps remove carbon dioxide and other wastes. Therefore, the Assertion (A) is true.

The placenta does not develop by the direct fusion of the zygote and endometrial lining. It develops mainly from the chorionic villi of the embryo and the uterine endometrium. Therefore, the Reason (R) is false.

Hence, A is true and R is false.