A) cyst
B) encyst
C) spicule
D) gemmule
Correct Answer: D
Solution :
Under unfavourable conditions like high temperature, dry condition, sponges body gets divided into numerous small spore like bodies called gemmules to tide over the adverse environmental conditions. Cyst is formed during unfavourable condition in Amoeba. Spicules are endoskeletons of sponge body.
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