CBSE Class-8 Science: Questions 18 - 24 of 469
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Question number: 18
Question number: 19
Question number: 20
Question number: 21
Question number: 22
A small capsule like sac that enclose an organism in resting stage.
The outermost layer of earth
In animals a multi-layered extra cellular external body covering
Question number: 23
Fixation of Nitrogen is:
The process of conversion of free nitrogen into compounds of nitrogen.
Free nitrogen present in the atmosphere.
Release of ammonia after death or decay of plant bodies.
Conversion of nitrogen into amino acids and proteins by the plants