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NEET 2020 · BiologyPrevious Year Question

Which of the following is not an attribute of a population?

Answer: (B) Species interaction. Answer: (B) Species interaction.

  1. A.Mortality
  2. B.Species interaction✓
  3. C.Sex ratio
  4. D.Natality

Correct Answer

(B) Species interaction

Solution & Explanation

Answer: (B) Species interaction. Solution: A population has its own attributes that an individual organism does not: birth rate (natality), death rate (mortality), sex ratio, age distribution/age pyramid and population density. Species (interspecific) interaction is a community-level phenomenon occurring between two different species, not an attribute of a single population. Hence Mortality, Sex ratio and Natality are population attributes, while Species interaction is not. The external key (B) is confirmed correct. NCERT: Ch 11, p.191, lines 25-37 — "A population has certain attributes whereas, an individual organism does not. An individual may have births and deaths, but a population has birth rates and death rates."

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