Question

Give an example for each of the following:

a. A viviparous animal

b. A fish possessing a poison sting

c. A fish possessing an electric organ

d. An organ, which regulates buoyancy

e. Animal, which exhibits alternation of generation

f. Oviparous animal with mammary gland

Answer 1

a. Viviparous animal:

● Organisms which give birth to young ones are called viviparous organisms.

● The development of young ones takes place inside the mother’s body.

Final answer:

Panthera leo (Lion)

b. A fish possessing a poison sting:

● Trygon is also called sting ray.

● The sting is present on the tail.

Final answer:

Trygon (Sting ray)

c. A fish possessing an electric organ:

● Torpedo possesses an electric organ which is a modified form of muscle.

Final answer:

Torpedo (Electric ray)

d. Buoyancy regulating organ:

● Swim bladder or air bladder is present in bony fishes.

● Air bladder is a buoyancy organ.

Final answer:

Air bladder

e. Animal exhibiting alternation of generation:

● Obelia shows two forms, polyp and medusae. The two forms alternates with each other in their life cycle.

• Polyps are the asexually reproducing forms.
• Medusae are the sexually reproducing forms.

Final answer:

Obelia (Sea fur)

f. Oviparous animal with mammary gland:

● All mammals possess mammary glands.

● Mammals are viviparous (gives birth to young ones) except a few egg-laying mammals.

● Egg laying mammals also possess mammary glands.

Final answer:

Echidna (spiny anteater)