How does cross-fertilization occur in tapeworms?
Understand the Problem
The question is asking about the method by which tapeworms undergo cross-fertilization. It presents four options, and we need to identify the correct one that describes how genetic material is exchanged between different tapeworms or segments of the same tapeworm.
Answer
Cross-fertilization happens when sperm from one tapeworm fertilizes the eggs of another, typically when multiple worms infect the same host.
Cross-fertilization in tapeworms occurs when sperm from one tapeworm fertilizes the eggs of another. This is more likely to happen when multiple tapeworms are present in the same host. Although tapeworms are hermaphroditic, possessing both male and female reproductive organs, cross-fertilization is the norm.
Answer for screen readers
Cross-fertilization in tapeworms occurs when sperm from one tapeworm fertilizes the eggs of another. This is more likely to happen when multiple tapeworms are present in the same host. Although tapeworms are hermaphroditic, possessing both male and female reproductive organs, cross-fertilization is the norm.
More Information
Tapeworms are hermaphroditic, meaning each individual possesses both male and female reproductive organs.
Tips
It is a common misconception that hermaphroditic organisms always self-fertilize. While self-fertilization is possible in tapeworms, cross-fertilization is the more common method.
Sources
- What are tapeworms and how do they live? - projects.cos.ncsu.edu
- Cestoda - Wikipedia - en.wikipedia.org
- Taenia pisiformis - Lander University - lanwebs.lander.edu
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