Question

Name the following:
(a) Animals which spend their lives fixed to a substratum. Se
(b) Formation of a cyst by secreting a hard resistant covering.
(C) Animals that live in sea water.
(d) A wide opening in sponges for passing out water.​

Answer 1

Answer:(a) Algae

(b) Amoeba

(c) Marine animals such as shark, whale etc

(d) Osculum

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