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Biology · 2023 · 2 marks
CBSE 2023 · Region 3 · Set 2 · Q19
List and explain any two factors that lead to a decrease in the population density of an area.
List and explain any two factors that lead to a decrease in the population density of an area.
Marking-scheme solution
Mortality/Death rate, the number of deaths in a given population during a given period.
Emigration, the number of individuals who have left the habitat and gone elsewhere during the time period under consideration.
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CBSE Class 12 Biology past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.