Zoology - Organisms and Populations Question with Solution | TestHub
ZoologyOrganisms and PopulationsPopulationsEasy2 minPYQ_2020
ZoologyEasysingle choice
In a population of an area, natality was equal to mortality for a given time period. However, the population density of the population increased. Which of the following may be the reason for the increase?
Options:
Answer:
B
Solution:
Natality and immigration contribute to an increase in population density, whereas mortality and emigration tend to decrease the size.
The density of a population (N) at time t can be expressed after a period of time (t + 1) as:
N(t+1) = Nt + [ (B + I) - (D + E) ]
where B denotes the number of births, I denotes the number of immigrants, D is the number of deaths and E is the number of emigrants.
If B = D, and N(t+1) > Nt, then I > E.
Stream:NTA_ABHYAS_NEETSubject:ZoologyTopic:Organisms and PopulationsSubtopic:Populations
⏱ 2mℹ️ Source: PYQ_2020
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