Question

What is common between parrot, platypus and kangaroo?

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

Answer 1

The Correct Option is D

To determine what is common between a parrot, platypus, and kangaroo, we need to evaluate each of the given options:

1. Toothless jaws:
   • Parrots have beaks instead of teeth, so they have toothless jaws.
   • Platypuses, however, have rough pads but do not have teeth as adults.
   • Kangaroos have teeth in their jaws for grinding grass.
   • Thus, this trait is not common to all three animals.
2. Functional post-anal tail:
   • All three animals have a tail, but the function and presence differ in relation to a post-anal characteristic common in reptiles and some aquatic animals.
   • The role and structure of the tail are different in each, and this specific trait isn't uniformly relevant.
3. Ovoparity:
   • Ovoparity refers to laying eggs, as seen in platypuses, which are monotremes and lay eggs.
   • Parrots are also oviparous.
   • Kangaroos give birth to live young, eliminating this as a common factor.
4. Homoiothermy:
   • All three animals—parrot, platypus, and kangaroo—are warm-blooded or homoiothermic, meaning they maintain a constant body temperature regardless of environmental conditions.
   • This is a trait common to all mammals and birds.

Therefore, the correct answer is Homoiothermy, as it is a shared trait among all three species being warm-blooded animals.