1. | deaths exceeds number of births and also number of emigrants equals number of immigrants |
2. | births plus number of immigrants equal number of deaths plus number of emigrants |
3. | birth plus number of emigrants is more than the number of deaths plus number of immigrants |
4. | birth plus number of immigrants is more than the sum of number of deaths and number of emigrants |
The process of individuals of the same species that have come into the habitat from elsewhere during the time period under consideration is referred as:
1. Association
2. Emigration
3. Competition
4. Immigration
What type of human population is represented by the following age pyramid?
A country with a high rate of population growth took measures to reduce it. The figure below shows age-sex pyramids of populations. A and B are twenty years apart. Select the correct interpretation about them:
Interpretations
1. | 'A' is more recent and shows a slight reduction in the growth rate |
2. | 'B' is an earlier pyramid and shows stabilised growth rate |
3. | 'B' is more recent showing that the population is very young |
4. | 'A' is the earlier pyramid and no change has occurred in the growth rate |
Geometric representation of age structure is a characteristic of:
1. Biotic community
2. Population
3. Landscape
4. Ecosystem