Match List-I with List-II:
| List-I | List-II |
| A. Immigration | I. Number of births during a given period in the population |
| B. Natality | II. Number of deaths in the population during a given period |
| C. Mortality | III. Number of individuals of the population who left the habitat and went elsewhere |
| D. Emigration | IV. Number of individuals of the same species that have come into the habitat from elsewhere |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → A-IV, B-I, C-II, D-III
The density of a population changes because of four basic processes. Two of them, natality and immigration, add to the population; the other two, mortality and emigration, take away from it.
(A) Immigration — this matches (IV) Number of individuals of the same species that have come into the habitat from elsewhere. Immigrants come in from outside.
(B) Natality — this matches (I) Number of births during a given period in the population. Births add to the initial density.
(C) Mortality — this matches (II) Number of deaths in the population during a given period.
(D) Emigration — this matches (III) Number of individuals of the population who left the habitat and went elsewhere. Emigrants go out of the habitat.
So the correct match is A-IV, B-I, C-II, D-III.
NCERT Extract:
Population Growth – “… (i) Natality refers to the number of births during a given period in the population that are added to the initial density. (ii) Mortality is the number of deaths in the population during a given period. (iii) Immigration is the number of individuals of the same species that have come into the habitat from elsewhere during the time period under consideration. (iv) Emigration is the number of individuals of the population who left the habitat and gone elsewhere during the time period under consideration.”
Figure 11.2