Question

What is common between Parrot, Platypus, and Kangaroo?

• A. Toothless jaws
• B. Homoiothermy
• C. Functional post-anal tail
• D. Oviparity

Answer 1

The correct option is B

Homoiothermy

The correct option is option B:

Explanation for correct option:

1. Kangaroo and Platypus are mammals while parrot is a bird belonging to class Aves.
2. Homoiothermy is commonly seen both in animals and birds.
3. It is defined as the ability to regulate body temperature.
4. There is an exchange of heat from the metabolism of tissue to the external environment in order to maintain a constant temperature.
5. Homoiothermy is observed in Kangaroo, Parrot, and Platypus.

Explanation for incorrect options:

Option A:

Parrot and Platypus have toothless jaws but kangaroo has teeth.

Option C:

The post-anal tail is present in Kangaroo and Platypus but absent in Parrot.

Option D:

1. Oviparity is the development of egg and hatching that take place outside of the mother in reproduction mode.
2. Parrot and platypus show oviparity whereas, kangaroo shows viviparity.

Final Answer: Common between Parrot, Platypus, and Kangaroo is Homoiothermy