A) Hydra
B) Platyhelminthes
C) Ascaris
D) Earthworm
Correct Answer: C
Solution :
Rhabditis or rhabditiform is the larva of Ascdris. It is found in soil and human faeces, and is non-infective. It moults within the egg shell and becomes the second stage rhabditoid which is capable of infecting the host. In Pheretima a cocoon may contains many fertilized eggs but only one embryo develops, growing at the expense of other eggs serving as nurse cells. The development is direct i.e., without any free larval stage. The development in Platyhelminthes is direct or indirect, usually indirect in endoparasites with a complicated life cycle involving many larvae and hosts. There is no free larval stage in the development of Hydra.
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