Match List - I with List - II. Choose the correct answer from the options given below:List - I List - II (A) Natality (I) Number of individuals coming into the habitat from elsewhere (B) Mortality (II) Number of births in the population (C) Immigration (III) Number of individuals leaving the habitat (D) Emigration (IV) Number of deaths in the population
(A) - (II), (B) - (IV), (C) - (I), (D) - (III)
Understanding Population Dynamics Terms
This question asks us to match terms related to population dynamics with their correct definitions. Population dynamics studies how the size and age structure of populations change over time and space. Key factors influencing population changes are birth rate, death rate, and movement of individuals into or out of the area.
Key Terms in Population Dynamics
Let's define each term from List - I and find its corresponding definition in List - II.
- (A) Natality: This term refers to the number of births during a given period in the population. It represents the rate at which new individuals are added to the population through reproduction.
- (B) Mortality: This term refers to the number of deaths during a given period in the population. It represents the rate at which individuals are removed from the population due to death.
- (C) Immigration: This term refers to the number of individuals of the same species that have come into the habitat from elsewhere during a given period. Immigration adds individuals to the population size.
- (D) Emigration: This term refers to the number of individuals of the same species that have left the habitat and gone elsewhere during a given period. Emigration removes individuals from the population size.
Matching List - I with List - II
Now, let's match the definitions we discussed with the options provided in List - II:
- (A) Natality corresponds to (II) Number of births in the population.
- (B) Mortality corresponds to (IV) Number of deaths in the population.
- (C) Immigration corresponds to (I) Number of individuals coming into the habitat from elsewhere.
- (D) Emigration corresponds to (III) Number of individuals leaving the habitat.
Summary of Matches
We can summarize the correct matches in a table:
| List - I (Term) | List - II (Definition) | Match |
|---|---|---|
| (A) Natality | (II) Number of births in the population | (A) - (II) |
| (B) Mortality | (IV) Number of deaths in the population | (B) - (IV) |
| (C) Immigration | (I) Number of individuals coming into the habitat from elsewhere | (C) - (I) |
| (D) Emigration | (III) Number of individuals leaving the habitat | (D) - (III) |
Based on the matching, the correct combination is (A) - (II), (B) - (IV), (C) - (I), (D) - (III).
Revision Table: Key Population Terms
| Term | Effect on Population Size |
|---|---|
| Natality (Births) | Increases population size |
| Mortality (Deaths) | Decreases population size |
| Immigration (In-migration) | Increases population size |
| Emigration (Out-migration) | Decreases population size |
Additional Information on Population Change
The change in population size over time can be influenced by these four factors. The basic formula for population change is:
\(\Delta N = (B + I) - (D + E)\)
Where:
- \(\Delta N\) is the change in population size.
- \(B\) is the number of births (Natality).
- \(I\) is the number of immigrants (Immigration).
- \(D\) is the number of deaths (Mortality).
- \(E\) is the number of emigrants (Emigration).
Understanding these terms is fundamental to studying ecology and population dynamics, helping predict how populations might grow, shrink, or remain stable in a given environment.
Important Questions from Organisms and Populations
Which of the following period is referred as the period of population explosion in India?
The majority of phytophagous nematodes are
- The number of individuals in the reproductive age group is more than the number of individuals in the pre-reproductive age group, the shape of its age pyramid would reflect the growth status of the population as:
Which of the following periods is known as the period of population explosion in India?
