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Pollen grain is...

Pollen grain is

A

highly reduced male gametophyte

B

well developed male gametophyte

C

highly reduced sporophyte

D

well developed female gametophyte

Text Solution

AI Generated Solution

The correct Answer is:
To answer the question "Pollen grain is," we need to analyze the options provided and understand the characteristics of pollen grains in the context of plant biology. ### Step-by-Step Solution: 1. **Understanding Pollen Grain**: - Pollen grains are the male gametophytes in seed-bearing plants. They are crucial for reproduction as they carry male gametes. 2. **Identifying the Structure**: - Pollen grains are highly reduced structures. They typically consist of just a few cells, often only two or three. 3. **Formation of Pollen Grain**: - Pollen grains develop from microspores, which are produced in the male reproductive structures (anthers) of flowering plants (angiosperms). 4. **Function of Pollen Grain**: - The primary function of pollen grains is to facilitate fertilization. They are transferred from the anther to the stigma of a flower through various means such as wind, water, or insects, in a process known as pollination. 5. **Comparison with Other Options**: - The other options provided (well-developed male gametophyte, highly reduced sporophyte, well-developed female gametophyte) do not accurately describe pollen grains. - A well-developed male gametophyte would imply a more complex structure than what pollen grains represent. - A highly reduced sporophyte is incorrect as pollen grains are not sporophytes but gametophytes. - The term "well-developed female gametophyte" refers to the embryo sac, which is not related to pollen grains. 6. **Conclusion**: - Based on the analysis, the correct answer is that pollen grain is a **highly reduced male gametophyte**. ### Final Answer: Pollen grain is a **highly reduced male gametophyte**. ---
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