Question

Which one of the following is one of the characteristics of a biological community?

• A. Natality
• B. Stratification
• C. Mortality
• D. Sex-ratio

Answer 1

The correct option is B

Stratification

The correct option is B.

Explanation of the correct answer:

1. When more than two species populations reside in the same geographical area over the same time period then it is called a biological community or ecological community.
2. As different populations have different characteristics from each other leads to develop the various characteristics of the biological community.
3. These characteristics are dominance, diversity, trophic organization, stratification, etc.
4. The biological community is arranged in different layers in a geographical area, this arrangement is known as stratification.
5. For example, In the Forest area, plants are arranged vertically, at the topmost trees and canopies, and in the lowermost are grasses, and the phenomenon is vertical stratification.

Explanation of the incorrect answers:

Option A:

1. Natality means the birth rate.
2. The birth rate is the rate of newborns in the population per a particular time span.
3. It is a characteristic of a particular population, not a whole community.

Option C:

1. Mortality means death rate.
2. The death rate is the rate of deaths of organisms in a population per particular time span.
3. It is also a characteristic of a particular population.

Option D:

1. The sex ratio is defined as the number of male individuals in a particular population per number of female individuals in the same population.
2. It is also a characteristic of a particular population.

Final answer: Stratification is one of the characteristics of a biological community.