Q17 of 163 Page 226

Which one term in the following includes the others?

Air, flora, fauna, environment, water, sunlight, soil

Environment is the term which includes air, flora, fauna, water, sunlight and soil.

Environment is defined as the geographical surrounding in which an organism (plants, animals, human) lives. Air, flora (plants), fauna (animals) water, sunlight and soil; all are components of the environment.


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15

Arrange the following in a food chain: Fish, Algae, Small animals, Big Fish

 16

Which organisms belong to third and fourth trophic levels in the food chain comprising the following?

Rats, Plants, Hawk, Snakes

 18

A food chain represents a unidirectional flow of X. What is X?

 19

Fill in the following blanks with suitable words:

(a) Decomposer organisms are................in their action.


(b) In nature, all green plants are..................... whereas animals are consumers.


(c) A series of organisms, each of which feeds on the next organism, the beginning of which is a green plant, is called a..................


(d) The science that deals with the inter-relationships of living things with one another and their environment is called....................


(e) Plastic is a ......................material whereas paper is a..................material.