Question

Which of the following is a warm blooded animal?
(A) Parrot
(B) Turtle
(C) Lizard
(D) Rohu

Answer 1

Hint:Warm blooded animals are those which are able to maintain a constant internal body temperature. They are also known as homoeothermic animals. Irrespective of the external temperature, these animals have the ability to maintain relatively constant internal temperature. Mammals and birds are warm blooded animals.

Complete answer:
Homoeothermic animals are those animals which have the ability to maintain a relatively constant body temperature. They are also known as warm blooded animals. Usually, the internal body temperature is higher than that of the environmental temperature. They produce heat within their body. They obtain energy through breaking down of food molecules. They maintain constant body temperature mainly through metabolism and certain adaptive measures. According to the external temperature, they regulate their body temperature through sweating, panting or hibernation. Examples of warm blooded animals are mammals and birds.

Contrary to warm blooded animals, cold blooded animals don't have the ability to maintain a constant body temperature. Their body temperature fluctuates according to the external temperature. They gain energy in the form of heat to adjust body temperature. Metabolic rate of cold blooded animals is not always the same. They obtain energy from the surrounding by means of basking, sun bathing, etc. Cold blooded animals include fishes, amphibians, reptiles and insects.
Understanding the options one by one,
(A) Parrot – It belongs to the class Aves, which are warm blooded animals. This is the correct answer.
(B) Turtle – It belongs to the class Reptilia. Reptiles are cold blooded animals. This is not the correct answer.
(C) Lizard – It belongs to the class Reptilia. Hence, this is not the correct answer.
(D) Rohu – It belongs to Super class Pisces. Hence, this is not the correct answer.

Therefore, the correct answer is option (A).

Note:It is essential to remember that all mammals and birds without any exceptions are warm blooded animals. They maintain internal constant body temperature, which is always higher than that of the surrounding temperature. Whereas, the other classes under the subphylum vertebrata, are cold blooded animals.