Q.Give an account of population regulation.

Step 1. Every animal population has an inherent tendency to increase in number, but this increase cannot continue indefinitely.

Step 2. Once the carrying capacity of the environment is reached, population numbers stop climbing and instead remain static, or fluctuate depending on the prevailing environmental conditions.

Step 3. This regulation happens through two categories of factor. Density-independent (extrinsic) factors act on the population regardless of how crowded it already is — the chapter names availability of space, shelter, weather and food. …

State the carrying-capacity limit, then list both factor categories (density-independent/extrinsic and density …

• Mixing up which factors are density-independent (extrinsic) versus density-dependent (intrinsic) — e.g., mist …