Which of the following can show self fertilization?

• A. Earthworm
• B. Liver fluke
• C. Fish
• D. Roundworm

Self-fertilization is a reproductive strategy where an organism can fertilize its own eggs with its own sperm. Among the options provided, the organism that can demonstrate self-fertilization is:

Correct Answer: A. Earthworm

Earthworms are hermaphrodites, meaning they possess both male and female reproductive organs. This allows them to produce both sperm and eggs, enabling self-fertilization under certain conditions.

Other Options Explained

• Liver Fluke: Typically requires a host for reproduction and does not self-fertilize.
• Fish: Generally reproduce through external fertilization, where eggs and sperm are released into the water.
• Roundworm: Usually have separate sexes and do not self-fertilize.

In summary, earthworms are unique in their ability to self-fertilize, while the other organisms listed have different reproductive strategies.