MEDIUM
NEET
IMPORTANT
Earn 100
In some cases, population density is measured in terms of biomass rather than in terms of numbers because
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Important Questions on Organisms and Populations
HARD
NEET
IMPORTANT
Which of the following is not an example of using relative density to measure population density in a certain area?
MEDIUM
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IMPORTANT
For which of the following cases, population density can be easily determined by utilising a non-biological parameter?
HARD
NEET
IMPORTANT
The given figure represents different factors affecting population density (N). If B = natality, D = mortality, E = emigration and I = immigration; then select the incorrect option regarding these.
MEDIUM
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IMPORTANT
The density of a population, in a given habitat, during a given period, fluctuates due to changes in certain basic processes. On this basis, fill up boxes A and B in the given flowchart with the correct option.
EASY
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IMPORTANT
Which of the following is not a factor that would limit the growth of a population?
MEDIUM
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IMPORTANT
The following table summarises the differences between natality and mortality. Select the incorrect ones.
| Natality | Mortality | |
|---|---|---|
| (i) | Natality is the number of births per unit population per unit time. | It is the number of deaths per unit population per unit time. |
| (ii) | It adds new individuals to the population. | It removes individuals from the population. |
| (iii) | It increases the size of a population. | It reduces the size of a population. |
| (iv) | It increases population density. | It reduces population density. |
| (v) | It is low when the population size is small and high when the population size is large. | It is high when the population size is small and low when the population size is large. |
EASY
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IMPORTANT
Which of the following factors has a negative effect on the population growth rate?
MEDIUM
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IMPORTANT
If, N = population density at a time then population density at time t + 1 can be written as . Select the correct option for A, B, C, and D from the following options.
