Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R):…

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R):

Assertion (A): A flower is defined as modified shoot wherein the shoot apical meristem changes to floral meristem.

Reason (R): Internode of the shoot gets condensed to produce different floral appendages laterally at successive nodes instead of leaves.

In the light of the above statements, choose the correct answer from the options given below:

  1. A is false but R is true.
  2. Both A and R are true and R is the correct explanation of A.
  3. Both A and R are true but R is NOT the correct explanation of A.
  4. A is true but R is false.

Solution

A flower in Angiosperms is a highly modified shoot. The shoot apical meristem (SAM) changes to floral meristem upon floral induction.

During floral induction, the internodes, which are longer in vegetative part, do not elongate further. This causes the shortening and condensation of the floral axis. The apex produces different kinds of floral appendages laterally at the successive nodes instead of leaves. These forms the floral whorls (like outermost calyx, corolla, androecium and innermost gynoecium). They are placed on the flat thalamus.

Asked in: NEET 2023 (All India)

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