write down characteristics of protozoa?
Answers
Answer:
characteristics are: Protozoans exhibit mainly two forms of life; free-living (aquatic, freshwater, seawater) and parasitic (ectoparasites or endoparasites). They are also commensal in habitat. They are small, usually microscopic, not visualize without a microscope.
Answer:
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. hope it helps.