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Organisms and Populations — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYOrganisms and Populations2 Marks
Question
Shark is eurythermal, while polar bear is stenothermal. What is the advantage the former has and what is the constraint the latter has?
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Answer

  • Shark is eurythermal because it can tolerate and thrive in a wide range of temperatures.
  • Polar bear is stenothermal as it can tolerate and thrive only in a narrow range of temperatures.
  • The thermal tolerance determines the geographical distribution of organisms; hence shark can live in a wide variety of places but the polar bear is restricted only to a narrow range (polar regions or ice-capped mountains), beyond which it cannot survive.

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