Question

Which of the following traits characterizes gymnosperms?

A. Reproductive structures are located in a flower

B. The plants carry exposed seeds on modified leaves

C. After fertilization the ovary thickens and forms a fruit

D. The gametophyte is longest phase of the life cycle.

E. None of these

Answer 1

racAnswer:

(B) The plants carry exposed seeds on modified leaves is characteristic of gymnosperms.

This can be explained as following :

The gymnosperms do not posses flowers but they have modified leaves called strobilus or cone which contains the reproductive structures male, female or both .

The gymnospermic plants lacks the ovary so they do not form the fruits.

The gymnosperms have the sporophytic phase dominant in their life cycle the gametophytic phase is reduced.