Advertisements
Advertisements
प्रश्न
With the help of suitable diagrams, explain how the age structures determine the trend of population.
Advertisements
उत्तर
The relative proportion of individuals of various age groups in the population is called the age structure of the population.
Role of age structure:
Age structure (distribution of age groups) determines the trend of the population.
- Growing population: The population having a larger number of individuals of the pre-reproductive age groups shows a very rapid rate of growth.
- Steady population: Population having the same number of pre-reproductive and post-reproductive age groups is stable.
- Declining population: A large number of post-reproductive and a small number of pre-reproductive groups make the population decline.
APPEARS IN
संबंधित प्रश्न
Which of the following is wrongly matched?
State any two districts with favourable sex ratio. Indicate the ratios.
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 ____________.
Which of the following attributes links ecology to population dynamics, genetics, and evolution?
The number of individuals present per unit space in a given time is known as ______.
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.
Identify the type of population depicted in the given pyramid.
Logistic growth curve has many phases which are respectively:
The type of natality that is relative to a specific criterion such as age is ______.
Explain the term Emigration.
