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Question

Which among these is not a homeotherm?

A
Aptenodytes
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B
Testudo
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C
Delphinus
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D
Neophron
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Solution

The correct option is B Testudo
  • Homeothermic animals are those organisms that maintain its body temperature at a constant level by its metabolic activity.
  • Poikilothermic animals are those which do not use metabolic heat to maintain their body temperature but take in the temperature of the environment.
A. Aptenodytes is a genus which contains species of penguins collectively known as the great penguins.
  • All the birds including penguins are warm-blooded or homeothermic animals.
B. Testudo is a genus which contains species of tortoises.
  • Most fishes, invertebrates, reptiles and amphibians are poikilotherms or cold-blooded animals.
C. Delphinus is the genus which contains species of dolphins.
  • Whales, dolphins, seals and marine mammals can maintain a stable body temperature.
D. Neophron is a genus which contains species of scavenger vultures.
  • They are homeothermic animals as they are birds.
  • So, the correct answer is Testudo.

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