Penetrant, volvent and glutinant are types of [CPMT 1988]
A) Nematocysts of Hydra
B) Tentacles of Hydra
C) Zooids of Obelia
D) Tentacles of Obelia
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zooids of obelia..
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Penetrant, volvent and glutinant are types of A) Nematocysts of Hydra.
The hydra is simple invertebrates that belong to the "phylum Cnidaria". They are found in freshwater ponds and lakes. They can reproduce both sexually and asexually.
The nematocysts contain poisonous tentacles around them. They have 4 types of tentacles around their tentacles. Three types are used for attacking and consuming the prey while one is used as a defence against its predators.
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