Parasites have mechanisms which allow them to evade host defense systems. Give T
ID: 209656 • Letter: P
Question
Parasites have mechanisms which allow them to evade host defense systems. Give THREE different types of mechanisms.
There are 4 fungus phyla; name TWO and give a characteristic and example.
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Explanation / Answer
1. Parasites have mechanisms which allow them to evade host defense systems. Give THREE different types of mechanisms.
Ans:
Parasitism is a relationship between 2 species, where one species (parasite) lives at the expense of other species (host) for an extended period of time, causing harm to it. The parasites include protozoa, worms, insects, plants, fungi etc.
the different mechanisms of evasion of parasites into host are:
a. Ectoparasitism: This is the parasitism where parasites live outside host's body. Eg: ticks, lice- feed on host's blood.
Cuscuta- a leafless chlorophyll less plant which grows on other plants and derives its nutrients from the host, weakening and destryoing them.
Epiparasites come under this category as well. these are parasites feeding on other parasites.
b. Endoparasitism: This is the type of parasitism where parasits live inside host's bosy. Eg: nematodes and hookworms (live inside host's digestive system invaded from unhygenic meat or soil).
c. Mesoparasitism: This is the type of parasitism where parasites enter the hos's external openings and usually lives partly embedded in its host with the anterior end forming an anchor process.
2. There are 4 fungus phyla; name TWO and give a characteristic and example.
Ans:
Names of 2 fungal phyla are: Ascomycota and Zygomycota
a) characteristics of Ascomycota
a) characteristics of Zygomycota:
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