Question

Given below are two statements:
Statement (I): Monoecious refers to the mechanism of production of male and female flowers at different times on the same tree.
Statement (II): Dichogamy refers to the production of male and female flowers separately in two different trees.
In light of the above statements, choose the most appropriate answer from the options given below.

• A. Both Statement (I) and Statement (II) are correct.
• B. Both Statement (I) and Statement (II) are incorrect.
• C. Statement (I) is correct but Statement (II) is incorrect.
• D. Statement (I) is incorrect but Statement (II) is correct.

Hint:

Remember the correct definitions: Monoecy/Dioecy refer to spatial distribution of sexes, whereas Dichogamy (Protandry/Protogyny) refers to the temporal separation of floral maturity.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Outcrossing mechanisms in forest trees prevent self-pollition and promote genetic diversity.
Understanding floral biology terms is fundamental to forest tree improvement and silviculture.

Step 2: Detailed Explation:
Let us critically examine both statements:
- Statement (I): Monoecious describes plants that have separate male (stamite) and female (pistillate) flowers on the same individual plant.
It refers to spatial separation on a single plant, not temporal.
The mechanism of producing male and female flowers at different times on the same tree is called dichogamy.
Thus, Statement (I) is incorrect.
- Statement (II): Dichogamy refers to the temporal separation of male and female reproductive organ maturation (pollen shed vs. stigma receptivity) in the same flower or tree.
It does not refer to separate trees.
The production of male and female flowers on entirely different trees is called dioecious.
Thus, Statement (II) is incorrect.
Since both statements misrepresent the definitions of monoecy and dichogamy, both are incorrect.

Step 3: Fil Answer:
Both Statement (I) and Statement (II) are incorrect.
Hence, the correct option is (B).