Question

Louse is
A) Ectoparasite of man
B) Entero parasite of man
C) Gum parasite of man
D) Not a parasite at all

Answer 1

Parasites are defined as the organisms that live on or in a host organism and get its nutrition and energy from or at the expense of its host. Parasites are of categorised into two types-
i) Ectoparasites
ii) Endoparasites.

Complete answer:
Parasites show some common adaptation so that they can receive maximum benefit from the host but without killing them. However, the host does get harmed by the parasites. Most of the parasites have evolved and begin to be host-specific in a way that both hosts and parasites tend to coevolve.

Now let us find solution from given options:
A) Ectoparasite of man : Ectoparasites are defined as the organisms that live on the outside of the host. Example-human body lice or can be called as louse
B) Entero parasite of man : Endoparasites or also called entero parasites live in the digestive tract, body cavities, various organs, or blood or other tissues of the host. Examples include -plasmodium.
C) Gum parasite of man : The parasite that lives near the base of the teeth that is in the gums is termed as gum parasites. Examples include: Entamoeba
D) Not a parasite at all: It is a kind of parasite

Hence the correct answer is option ‘A’. i.e, Ectoparasite of man.

Note: Sometimes the host evolves and develops a special or protective mechanism for rejecting or resisting the parasite. The parasite has to start the mechanism to counteract and neutralize them, in order to be successful to the same host species and to adapt to the situation and survive. There are mainly three types of adaptations that is presented by by Parasites:
i) Structural Adaptations (Morphological and
Anatomical Adaptations)
ii) Physiological Adaptations
iii) Reproductive Adaptations