Question

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 node instead of leaves.
In the light of the above statements, choose the correct answer from the options given below:

• A. Both A and R are true but R is NOT the correct explanation of A
• B. A is true but R is false
• C. A is false but R is true
• D. Both A and R are true and R correct explanation of A

Answer 1

The Correct Option is D

In order to solve the question regarding the assertion and reason, examine each statement in relation to the biology of flowering plants:

1. Assertion A: A flower is defined as a modified shoot wherein the shoot apical meristem changes to floral meristem.
2. Reason R: The internode of the shoot gets condensed to produce different floral appendages laterally at successive nodes instead of leaves.

Now, let's analyze the statements:

1. The shoot apical meristem transformation into floral meristem explains the genesis of flowers from a shoot. This supports Assertion A as true because this is a widely accepted definition of how flowers form.
2. Reason R states that the internodes condense, leading to the formation of floral structures at successive nodes rather than leaves. This mechanism accurately describes how floral parts are organized instead of the usual vegetative leaves. Thus, Reason R is also true.

In the context of plant biology, both A and R are consistent with the botanical understanding of flower development. Moreover, the reason provides the detailed mechanism of transformation and explains the assertion appropriately.

Therefore, the correct relationship between A and R is as follows: Both A and R are true, and R is the correct explanation of A.

Answer 2

Assertion A is true. A flower is indeed defined as a modified shoot in which the shoot apical meristem changes to floral meristem, leading to the formation of reproductive structures.

Reason R is also true. In a flower, the internode of the shoot is condensed, and this condensed region gives rise to different floral appendages (such as sepals, petals, stamens, and carpels) laterally at successive nodes instead of producing leaves. This phenomenon is a key characteristic of floral development.

Therefore, The correct option is (D): Both A and R are true and R correct explanation of A