Question

A true fruit is formed from
A) Ovary
B) Ovary and thalamus
C) Ovary and calyx
D) Ovary and receptacle.

Answer 1

The flower after fertilisation develops into a fruit. A fruit is a dry or fleshy part of a flowering plant which contains seed which is a mature ovule. The female reproductive part of the flower develops into a true fruit.

Complete answer:
A true fruit is a fruit which develops from the mature and ripened ovary post fertilisation. The seeds of the fruit are developed from the ovule which is inside the ovary. The fruit which is developed from any other floral part of the flower along with ovary or without ovary is known as false fruit. The false fruit can be developed from calyx, receptacle or thalamus. False fruit does not require fertilisation for its development.

Most of the false fruit is developed from the receptacle which is a cup like enlargement which surrounds the ovary. For example, pear.
I) Thalamus- It is the thickened part of the stem from which the floral parts grow. In some plants like apples, false fruit develops from the thalamus.
II) Calyx- It comprises sepals which protects the petals. It grows into accessory fruit in many plants.

Thus, the correct answer is option ‘A’.

Note: A true fruit is a fruit which develops from ovary whereas a false fruit is a fruit which develops from any other part of the flower other than ovary. A true fruit has seed inside them whereas a false fruit is parthenocarpic in nature. Some examples of true fruit are mango, kiwi, blueberry, plums etc.