Question

introduction of general characteristics of protozoa

Answer 1

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♦ Followings are the characteristics of Protozoa:

1. They do not have cell wall; some however, possess a flexible layer, a pellicle, or a rigid shell of inorganic materials outside the cell membrane.

2. They have the ability during their entire life cycle or part of it to move by locomotor organelles or by a gliding mechanism.

3. They have heterotrophic mode of nutrition, whereby the free-living forms ingest particulates, such as bacteria, yeast and algae, while the parasitic forms derive nutrients from the body fluids of their hosts.

4. They reproduce primarily by asexual means, although in some groups sexual modes also occur.

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