1
Question
Assertion :Small sized animals are rarely found in polar regions Reason: Small sized animals have larger surface area relative to their volume and they have to spend much energy too generate body heat through metabolism.
Assertion :Small sized animals are rarely found in polar regions Reason: Small sized animals have larger surface area relative to their volume and they have to spend much energy too generate body heat through metabolism.
Open in App
Solution
The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Thermoreguation is an energetically expensive process for many organisms. Heat loss or gain is a function of surface area. Small sized animals (such as shrews, humming birds etc.) have a larger surface area relative to their volume, they tend to lose body heat very fast when it is cold outside, thus they have to expend much energy o generate body heat thorough metabolism. This is the main reason why very small animals are rarely found in polar regions. So, the correct answer is 'Both Assertion and Reason are correct and Reason is the correct explanation for Assertion'.
Thermoreguation is an energetically expensive process for many organisms. Heat loss or gain is a function of surface area. Small sized animals (such as shrews, humming birds etc.) have a larger surface area relative to their volume, they tend to lose body heat very fast when it is cold outside, thus they have to expend much energy o generate body heat thorough metabolism. This is the main reason why very small animals are rarely found in polar regions. So, the correct answer is 'Both Assertion and Reason are correct and Reason is the correct explanation for Assertion'.
Suggest Corrections
0
Similar questions
View More
Join BYJU'S Learning Program
Explore more
Join BYJU'S Learning Program
