Question

Match column I with column II and select the correct option.

Column I	Column II
A. Ticks on dogs	1. Endoparasitism
B. Liver fluke	2. Brood parasitism
C. Cuckoo laying eggs in crow’s nest	3. Ectoparasitism

• A. A - 1, B - 2, C - 3
• B. A - 3, B - 1, C - 2
• C. A - 1, B - 3, C - 2
• D. A - 2, B - 3, C - 1

Answer 1

The correct option is B A - 3, B - 1, C - 2

Parasitism is a type of population interaction between two living species in which one organism (the parasite) lives and derives nutrition from another specific organism (the host). It is of the following types:

1. Ectoparasitism - The word ecto means outer. The parasites live on the external surface of the host organism. Example - Ticks on dogs.

2. Endoparasitism - The word endo means inner. The parasites live inside the body of host organism.
Example - Liver flukes that parasitise the liver in human beings.

3. Brood parasitism - It is a type of parasitism in which the parasitic bird lays its eggs in the nest of another bird (host) and lets the host incubate them. The eggs of the parasitic bird have evolved such that they are similar in size and colour to the host’s egg. This reduces the chances of detection and ejection of the foreign eggs by the host bird. Example - Cuckoo laying eggs in the crow’s nest.