Question

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A: The characteristic feature of the endosperm haustoria is that they are developed from the cellular endosperm only. Reason R: The endosperm haustoria are formed at the micropylar or chalazal or at both the ends and penetrate the nucellar tissue to absorb nutrition. In the light of the above statements, choose the most appropriate answer from the options given below

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

Hint:

Haustoria absorb nutrients from nucellar tissue during seed development.

Answer 1

The Correct Option is D

Concept:
Endosperm haustoria help in absorption of nutrients during seed development.
Step 1:
Haustoria are special structures formed to absorb nutrients from surrounding tissues.
Step 2:
Endosperm haustoria are not developed only from cellular endosperm. They may develop in different types of endosperm. Thus Assertion A is incorrect.
Step 3:
Haustoria may occur:
• At micropylar end
• At chalazal end
• At both ends They penetrate nucellar tissue and absorb nutrition. Thus Reason R is correct.
Step 4:
Therefore: \[ \boxed{\text{A is not correct but R is correct}} \] \[ \boxed{\text{Correct Option = (4)}} \]