Question

The two components of an ecosystem are
A) Plants and animals
B) Weeds, trees, animals and man
C) Energy flow and mineral cycling
D) Biotic and abiotic

Answer 1

Hint:Firstly, let us understand what is an ecosystem. Community in which a group of living organisms survive and interact with each other in a particular environment is called an Ecosystem.

Complete Answer:
An ecosystem consists of two main components. They are
->Biotic component
->Abiotic component
1.Biotic components
All the living organisms in the world constitute biotic components.
Example:- Plants, animals, microbes etc.
2.Abiotic components
All the nonliving things in the world constitute abiotic components.
Example:- Hills, water, air, soil, minerals etc.

Additional information:
>The structure of an ecosystem involves the physical features of environment and organisms, that includes the proportion of distribution of nutrients in a specific region along with its climatic conditions .
>Based on mode of nutrition, the ecosystem is classified into autotrophs, saprotrophs and heterotrophs.
>All the autotrophs like plants come under the category of producers as they manufacture food with the help of photosynthesis.
>All heterotrophs come under the category of consumers. They depend on other organisms for the sake of food.
>All the saprotrophs come under decomposers as they feed on the dead and decayed organic matter. >They play a vital role in recycling of nutrients.

Hence the correct answer is option (D) biotic and abiotic.

Note: Inorder to have a perfectly balanced ecosystem, the three important aspects of ecosystem that is , food chain, ecological pyramids, food web should be balanced. Aquatic ecosystem is considered as the largest ecosystem in the world which is composed of marine and fresh ecosystems.