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Organisms And Populations

Question
CBSEENBI12047520
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Fasciola hepatica (liver fluke) infects its intermediate host and primary host at the following larval stages respectively

  • redia and miracidium

  • cercaria and redia

  • cercaria and metacercaria

  • miracidium and metacercaria

Solution

D.

miracidium and metacercaria

In the life cycle of Fasciola, stages when it infects intermediate host is miracidium and primary host is metacercaria.

Miracidium- sporocyst, redia cercaria- metacercaria are the different larval stages according to development sequence.

Miracidium and cercaria larva are free swimming form in water while redia and sporocyst are formed in snail.

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