Question

Basic unit of ecological hierarchy is
A. Ecosystem
B. Biological community
C. Population
D. Individual

Answer 1

Hint: It is the ecological hierarchy's first level. Ecologists have sought more complicated ways to explain the interactions between species as they pass up the ladder. They culminate in the biosphere, which represents the entirety of all planet Earth's living organisms.

Complete answer:
First we should know about ecological hierarchy to answer this question. The principle of ecological hierarchy explains the organisation of biological species with respect to each other. This hierarchy level explores how one organism connects with its surroundings. In studying this stage, facets of evolution are used extensively.
Now, let us find the solution from the options-
An ecosystem is a population of living organisms that function as a system, in combination with the nonliving elements of their environment. It will not be an ecosystem, because it is one of the greatest hierarchical units. Thus, option A is not the correct option.
In biology, the community, also known as the biological community, is an interacting group of different organisms in a shared area. Thus, option B is not the correct option.
A population is a total of all individuals that exist in a single geographical region of the same species or group and are susceptible of interbreeding. Thus, option C is not the correct option.
The basic ecological hierarchy unit is individual and a community begins to grow from an individual that evolves into a whole ecosystem.
So, the correct answer is “Option D”.

Note:
The numerous new dimensions and divisions have resulted in many advancements and improvements in the field of ecology. Molecular ecology, eco-technology, mathematical ecology and environmental toxicology are some of the more specialized sectors.