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प्रश्न
Distinguish between Natality and Mortality.
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उत्तर
| Natality | Mortality |
| Natality is defined as the number of birth of organisms in a population of a specific area with the passage of time. | Mortality is defined as the number of deaths of organisms in a population of a specific area with the passage of time. |
| Natality is an inherent ability of a population to increase | Mortality decreases population size. |
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संबंधित प्रश्न
Describe diagrammatic representation of age structure showing declining population.
With the help of suitable diagrams, explain how the age structures determine the trend of population.
In sex ratio, Tamil Nadu ranks
Which district in TN has the highest sex ratio?
State any two districts with favourable sex ratio. Indicate the ratios.
Identify the type of growth in the given figure of age pyramid.
Age pyramid
The number of individuals of population who left the habitat during the time period under consideration is known as ______.
Which of the following is INCORRECT?
A biologist studied the population of rats in a barn. He found that the average natality was 300, average mortality 250, immigration 50 and emigration 100. The net increase in population is ____________.
Population density at time 't+ l' can be correctly represented as ______.
The type of population represented in the given age pyramid is
The number of individuals present per unit space in a given time is known as ______.
In a population, natality is used to represent ____________.
What will be the birth rate per individual per hour of a population of 50 Paramoecium present in a pool. The population of Paramoecium increases to 150 within an hour.
What does 'N' represent in the given equation of population density?
[Nt+1 = Nt + [(B + I) - (D + E)]
Which of the following situations contributes to increase in density of population?
What will be the net increase in the population if the average natality was 250, average morta1ity 240, immigration 20 and emigration 30?
Identify the type of population depicted in the given pyramid.
Mortality of a region is assessed by ____________ of individuals per unit area per unit time.
Changing nature of population is called ______
Match the following Column I with Column II.
| Column I | Column II |
| A. Population | (i) Part of the earth has all ecosystems. |
| B. Community | (ii) Assemblage of all individuals belonging to different species of an area. |
| C. Ecosystem |
(iii) Group of similar individuals of the same species, found in an area. |
| D. Ecosphere | (iv) Interaction between living organisms and their physical environment. |
Which of the following conditions represents zero population growth?
In a growing population of a country, ______.
What are the decisive factors for population density?
