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Which of the following is correct for Aschelminthes?
Option: 1
Fertilization is external and development is direct
Option: 2
Fertilization is internal and development is direct
Option: 3
Fertilization is internal and development is indirect
Option: 4
Fertilization is external and development is indirect
Answers (1)
Reproduction and Development in Aschelminthes. -
- Aschelminthes are dioecious animals, i.e., the male and female reproductive organs are present in different individuals.
- Sexual dimorphism is also observed, i.e., females are longer than males.
- Fertilization is internal and development occurs through the larval stage.
- Hence, development is indirect.
The following types of larvae are seen in different roundworms:
- Filariform larva - hookworm
- Microfilaria larva - Wuchereria
- Rhabditiform larva - Ascaris
-
Fertilization is internal and development occurs through the larval stage. Hence, the development is indirect.
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