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Motile sperm cells swim through an exter...

Motile sperm cells swim through an external film of water to reach female gametes in all of the following groups except for :

A

Pteridophyta

B

Spermatophyta

C

Lycopodiophyta

D

Bryophyta

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to analyze the reproductive methods of the different groups mentioned: Pleurophyta, Spermatophyta, Lycopodiophyta, and Dryophyta. ### Step-by-Step Solution: 1. **Understanding the Groups**: - **Pleurophyta**: This group includes bryophytes, which have flagellated sperm that swim through water to reach the female gametes. - **Spermatophyta**: This group consists of seed plants, which reproduce via seeds and do not require water for sperm to reach the female gametes. - **Lycopodiophyta**: This group is part of the pteridophytes and has flagellated sperm that swim through water to reach the female gametes. - **Dryophyta**: This group also includes plants that require water for the sperm to swim to the female gametes. 2. **Identifying the Exception**: - From the analysis, we see that both Pleurophyta, Lycopodiophyta, and Dryophyta have motile sperm that swim through water. However, Spermatophyta is the only group where the sperm does not swim through water to reach the female gametes. 3. **Conclusion**: - Therefore, the group where motile sperm cells do not swim through an external film of water to reach female gametes is **Spermatophyta**. ### Final Answer: Spermatophyta ---
To solve the question, we need to analyze the reproductive methods of the different groups mentioned: Pleurophyta, Spermatophyta, Lycopodiophyta, and Dryophyta. ### Step-by-Step Solution: 1. **Understanding the Groups**: - **Pleurophyta**: This group includes bryophytes, which have flagellated sperm that swim through water to reach the female gametes. - **Spermatophyta**: This group consists of seed plants, which reproduce via seeds and do not require water for sperm to reach the female gametes. - **Lycopodiophyta**: This group is part of the pteridophytes and has flagellated sperm that swim through water to reach the female gametes. ...
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