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Question

Dropping of gravid proglottides by cestodes is

A
Autophagy
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B
Autotomy
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C
Paedogenesis
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D
Apolysis
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Solution

The correct option is D Apolysis
Proglottides in the posterior end of the body are called gravid proglottides. They are longer than wide and are rectangular in shape. These are the oldest proglottides. The uterus is highly branched and filled with many eggs in these gravid proglottides. In Taenia solium, gravid proglottides are regularly detached from the posterior end of strobila and are sent out with the feces of the host. The shedding of gravid proglottides by the tapeworm is called apolysis. Apolysis is useful to the parasite in regulating the length of the body and facilitating the transfer of gravid proglottides to the intermediate host. So, option D is correct.

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