What type of marine amoeboid protozoan forms have silica shells on their surface?

What type of marine amoeboid protozoan forms have silica shells on their surface?
  1. Parasites
  2. Corals
  3. Fish
  4. Jellyfish

Solution

Amoeboid marine forms have silica shells on their surface and some of them such as Entamoeba are parasites. This indicates that the marine forms with silica shells on their surface are parasites, specifically Entamoeba.

Asked in: NCERT

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