Question

Match the terms of Column I with their appropriate description in Column II.

• A. A- 1, B-3, C- 4, D-2, E-5
• B. A- 2, B-5, C- 1, D-4, E-3
• C. A- 5, B-3, C- 1, D-2, E-4
• D. A- 4, B-3, C- 1, D-2, E-5

Answer 1

The correct option is D A- 4, B-3, C- 1, D-2, E-5

1. J shaped growth curve is seen when there is increase in the population density and the availability of the resources are unlimited. It occurs for a brief period of time only.
2. Intrinsic rate of natural increase (r) helps in assessing the influence of the biotic and abiotic factors of population growth. They are represented by b-d i.e., birth rate (b) - death rate (d).
3. Logistic growth is represented in the form of an S- shaped curve. The sigmoid growth curve is seen when the resources are limited. The limit is nature’s carrying capacity (K) for that species in that habitat. Verhulst-Pearl described logistic growth in the form of the equation $\frac{\mathrm{dN}}{\mathrm{dt}}=rN\frac{(K-N)}{K}$
4. Bell shaped age pyramid is seen in a stable population where the pre-reproductive and reproductive age groups are the same in number whereas, in the expanding population which gives a triangular shaped pyramid, the pre-reproductive age group forms maximum number at the basal end.