Question

Match List I with List II 

Choose the correct answer from the options given below: 
 

• A. A-I, B-III, C-IV, D-II
• B. A-III, B-II, C-I, D-IV
• C. A-II, B-I, C-III, D-IV
• D. A-II, B-III, C-IV, D-I

Hint:

Suffix "gyny" refers to female (Gynoecium); "andry" refers to male (Androecium).
"Proto" means first. So, Protogyny = Female first.

Answer 1

The Correct Option is B

Step 1: Understanding the Question:
The question focuses on mechanisms plants use to regulate pollination, specifically those that prevent self-pollination or ensure self-pollination.

Step 2: Detailed Explanation:

• Protogyny (A-III): A form of dichogamy where the Gynoecium (pistil) matures before the Androecium (stamen). Example: Pearl millet.

• Androgyny/Protandry (B-II): Usually referred to as Protandry, it is where the Androecium (stamen) matures before the Gynoecium (pistil). Example: Maize.

• Dichogamy (C-I): The general term for the maturation of male and female organs at different times in a bisexual flower to prevent self-pollination.

• Cleistogamy (D-IV): A mechanism for obligate self-pollination where the flowers remain closed and never open. Example: Commelina.
Final Answer:
Matching: A-III, B-II, C-I, D-IV. This corresponds to option (B).