Question

Name the following:

(a) Organism in which external ear (pinna) is present.

(b) Organism in which nictitating membrane is present.

Answer 1

1. Pinna: It is the outermost part, it has very fine hairs and glands. The glands secrete wax. It prevents entering of foreign organisms and dust into the body.
2. Nictitating Membrane: Apart from the eyelid, a transparent membrane called the nictitating membrane is present in amphibians such as frogs. It helps in protecting the eyes of the amphibians from water and mud while swimming in water. It also helps in keeping the eyes moist when the frog is on land.

Final Answer:

The organisms in which:

(a) External ear is present is Man.

(b) Nictitating Membrane is present in Frog.