Advertisements
Advertisements
Question
Describe diagrammatic representation of age structure showing declining population.
Advertisements
Solution
a. The relative proportion of individuals of various age groups in the population is called
age structure of the population.
b. Age structure of a population is the percentage of individuals of different age groups such as young (0-14 years), adults (15-59 years) and old (60 years and above).
c. The distribution of these age groups determine the trend of population.

d. In declining population, number of post reproductive age group is large whereas the number of pre reproductive age group is small.
e. Thus, the age structure shows declining population.
APPEARS IN
RELATED QUESTIONS
Construct an age pyramid which reflects an expanding growth status of human population.
Distinguish between Natality and Mortality.
Population density increases due to ______.
Which of the following is INCORRECT?
The type of population represented in the given age pyramid is

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.
Logistic growth curve has many phases which are respectively:
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. |

The above graph indicates ______ with relation to population.
If a pond with an average population of 20 lotus plants experiences 8 new plants through reproduction in one year, what is the natality rate?
