✓ Board-verified
Biology · 2022 · 2 marks
CBSE 2022 · Region 3 · Set 1 · Q5
Mammals are capable of maintaining homeostasis. But, very few smaller animals can survive in polar regions. Give reasons.
Mammals are capable of maintaining homeostasis. But, very few smaller animals can survive in polar regions. Give reasons.
Marking-scheme solution
Heat loss or gain is a function of surface area, since small animals have large surface area compared to their volume, they tend to lose body heat very fast during severe winters, have to expend much energy to generate body heat through metabolism so they undergo hibernation or migration.
All Organisms and Populations questions2022 question paperNCERT solutions: Organisms and PopulationsPractice Organisms and Populations →
More from Organisms and Populations
- Study the given graphs (X) and (Y) depicting the annual variation in solar radiation on Earth from January to December and answer the undermentioned…2022
- Assertion: Cattle and goats are never seen browsing on Calotropis growing in abandoned fields. Reason (R): Cattle and goats avoid grazing on…2023
- Interaction between clown fish living among the stinging tentacles of sea anemone is an example of -2023
- Why are predators considered to be 'prudent' in nature? Explain.2022
- State two morphological attributes observed in the leaves of desert plants that enable them to survive in extreme conditions in the desert.2022
- (i) Describe the population growth curve applicable in a population of any species in nature that has limited resources at its disposal. (ii) Give…2025
- Read the following passage and answer the questions that follow: In nature, we rarely find isolated, single individuals of any species; majority of…2025
- (i) Describe the Species-Area relationship as observed by Alexander von Humboldt, for a wide variety of taxa in nature. (ii) Draw the graph showing…2025
CBSE Class 12 Biology past-paper question from the 2022 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.