What is parasitism ? Define parasite, host. What are kinds of par

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29.

How does age distribution help in study of population?
Or
Give representation of a declining pyramid of age for human population.
Or
Give representation of stable pyramid of age for human population?

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30. What is parasitism ? Define parasite, host. What are kinds of parasite ?


Parasitism is the relationship between two organisms in which one obtains its nourishment from the other. One species is benefitted while the other is harmed.

Parasite. The organism, which obtains its food or nourishment from the other without directly killing it, is known as parasite.
Host. The second organism which provides food and harbours the parasite is named as host.

Parasites are of two kinds-
Endoparasite is the parasite that lives inside the body of the host.

Ectoparasite is the parasite which lives on the outside of the body of the host e.g. Leech, Louse, Bed bug.

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