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The number of births during a period in ...

The number of births during a period in the population that are added to the initial density is called natality.

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Give right answer of the following: (a) Number of births during a given period in the population that are added to initial density : 1 (b) Number of deaths in the populations in a given period: 2 (c) Number of individuals of the same species that have come into the habitat from elsewhere during a given time period: 3 (d) Number of individuals who left habitat and gone elsewhere during a given time period: 4

The number of births per thousand people in the population is expressed as :

In sigmoid populations growth curve, the initial stage of the curve is called :

The number of individuals of the population who left the habitat and gone elsewhere during the time period is called :

During 1850-2000 period, Indian population increased by 5/3 times.

The phase of the population growth when the natality is equal to mortality is called as :

If the birth rate is 100, the death rate is 10 and the number of individuals in a population group is 1000, then what will be the intrinsic rate of natural increase of the population ?

Following table summarises the differences between natality and mortality. Select the incorrect ones. {:("Natality","Mortality"),((i)"Natality is number of births per unit population per unit time.","It is 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 increase the size of population.","It decreases the size of population"),((iv)"It increase population density.","It reduces population density."),((v)"It is low when population size is small and high when population size is large.","It is high when population size is small and low when population size is large."):}

The number of individuals of the population who left the habitat and gone elsewhere during the time period under consideration is known as :

Assertion: The number of fish caught per trap is good enough measure of its populations density in the lake. Reason: For certain ecological investigations, there is no need to know the absolute populations densities, relative densities serve the purpose equally well.