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A unisexual flowering plant containing ...

A unisexual flowering plant containing either only staminate or only pistillate flowers prevents both

A

Autogamy and xenogamy

B

Autogamy and geitonogamy

C

Geitonogamy and xenogamy

D

Cleistogamy and xenogamy

Text Solution

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The correct Answer is:
To solve the question regarding a unisexual flowering plant that contains either only staminate (male) or only pistillate (female) flowers, we need to analyze the types of pollination and determine which ones would be prevented. ### Step-by-Step Solution: 1. **Understanding Unisexual Flowers**: - A unisexual flowering plant has either staminate (male) flowers or pistillate (female) flowers, but not both. This means that one type of reproductive structure is absent. 2. **Types of Pollination**: - **Autogamy**: This is self-pollination that occurs within the same flower. Since unisexual flowers lack both male and female parts, autogamy cannot occur in these plants. - **Xenogamy**: This is cross-pollination between different plants. Since a unisexual plant can still have male and female plants, xenogamy can occur if a male plant pollinates a female plant. - **Gytogamy**: This refers to pollination between two flowers of the same plant. Since a unisexual plant only has either male or female flowers, gytogamy cannot occur. 3. **Conclusion**: - Since autogamy and gytogamy both require the presence of both male and female reproductive structures (which are absent in unisexual plants), both types of pollination will be prevented. - Xenogamy, on the other hand, can still occur between different unisexual plants (one male and one female). Therefore, the types of pollination that are prevented in a unisexual flowering plant containing either only staminate or only pistillate flowers are **autogamy and gytogamy**. ### Final Answer: The correct answer is that a unisexual flowering plant prevents **autogamy and gytogamy**. ---

To solve the question regarding a unisexual flowering plant that contains either only staminate (male) or only pistillate (female) flowers, we need to analyze the types of pollination and determine which ones would be prevented. ### Step-by-Step Solution: 1. **Understanding Unisexual Flowers**: - A unisexual flowering plant has either staminate (male) flowers or pistillate (female) flowers, but not both. This means that one type of reproductive structure is absent. 2. **Types of Pollination**: ...
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