Choose the incorrect sentence.

  • A
    Many tribes live in the high altitude of Himalayas; they normally have a higher red blood cell count than people living in the plains.
  • B
    At high altitude,we must have experienced what is called altitude sickness.
  • C
    Archaebacteria live in hot springs where the temperature exceeds $100^{\circ}C$.
  • D
    Mammals from colder climates generally have shorter ears and limbs. This is called Allen's rule.

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Mammals from colder climates generally have shorter ears and limbs to minimize heat loss. This is known as:

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$(a)$ Burrowing
$(b)$ Building tubes
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Match the suitable substratum against each adaptation.

Which of the following represents an organism and its ecological niche correctly?

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