Chapter 2, Problem 4A

Summary Introduction

Introduction :

The biological organization is a hierarchy of complex biological structures and system. Each level increases in complexity as the level goes up from bottom to top. These levels start from molecules as the smallest unit and work up to the largest and most broad category.

Answer to Problem 4A

Correct answer :

The correct answer is option (B) Ecosystem.

Explanation of Solution

Explanation/justification for the correct answer :

Option (B). Ecosystem. An ecosystem is made up all the living communities in a certain area along with its non-living and physical components of the environment. An ecosystem is made by the inclusion of various communities, which are in turn made up of populations of individual organisms. So, the correct answer is option (B).

Explanation for incorrect answer :

Option (A) Community. A community can be described as a group or association of population of living organism who share the same environment. The organisms within the community share interests and particular characteristics. A community occupy the same geographical area at the same time. The population of lions and populations of zebras, elephants, dung beetles all together make the forest community. So, this is an incorrect answer.

Option (C) Individual. An individual is described as any living thing or organism. Individual of one group do not interbreed with individual of other groups. Lion and oak are individuals of animal and plant groups respectively. Individuals is one of the basic unit in the level of organization. So, this is an incorrect answer.

Option (D) Population. When a group of individuals of a given species live in a specific geographical area at a given time, it is known as population. For example, the river may contain a large population of fishes which may or may not be individual of same species. So, this is an incorrect answer.