Question

Which one of these animals is not a homeotherm ?

• A. Macropus
• B. Camelus
• C. Chelone
• D. Psittacula

Answer 1

The Correct Option is C

To solve the question, we need to understand the term "homeotherm." Homeotherms are animals that maintain a constant body temperature regardless of external environmental conditions. This is a trait found in warm-blooded animals, typically referred to as endotherms.

Let's evaluate each option:

1. Macropus: This is a genus that includes kangaroos and wallabies, which are mammals. Mammals are generally homeothermic, meaning they maintain a constant body temperature. Therefore, Macropus is a homeotherm.
2. Camelus: Camels belong to the family Camelidae and are mammals. Like other mammals, camels are homeothermic. Therefore, Camelus is a homeotherm.
3. Chelone: This genus includes turtles and tortoises, which are reptiles. Reptiles are ectothermic, meaning they rely on external environmental conditions to regulate their body temperature. Therefore, Chelone is not a homeotherm.
4. Psittacula: This refers to parrots, a type of bird. Birds are generally homeothermic, maintaining a constant body temperature. Therefore, Psittacula is a homeotherm.

Based on the evaluation above, the animal that is not a homeotherm is Chelone, as it is a reptile and relies on external conditions for body temperature regulation. Therefore, the correct answer is Chelone.