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Question

Select the incorrect statements from the following.


  1. An overwhelming majority of animals and nearly all plants maintain a constant internal temperature
  2. An orchid growing as an epiphyte on a mango branch is an example of commensalism
  3. In brood parasitism, the parasitic bird lays its eggs in the nest of its host and lets the host to incubate them
  4. Very small animals are rarely found in polar regions


Solution

The correct options are
A An overwhelming majority of animals and nearly all plants maintain a constant internal temperature

Warm-blooded animals like birds and mammals are the only animals that can maintain a constant internal temperature, most of the animals do not regulate their internal temperature. The largest purely terrestrial animal found in Antarctica is a flightless midge (a flightless fly) that grows no more than 13mm in length. All other Antarctic animals are either smaller than this or migrate spending some time of the year away from the deep south and the extreme cold. They either swim or fly away - and back again. An orchid growing as an epiphyte on a mango branch is an example of commensalism because the orchid derives its nourishment from the mango tree, but the mango tree, however, is not harmed.

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