Chapter 19 - Environmental Biology - Test 1

Biology Class 10
1. All the non living parts of the environment are called biotic factors.

1) False   2) True
2. Species is the basic unit of classification.

1) False   2) True
3. Ecosystem is not self sustaining system.

1) True   2) False
4. All populations living and interacting in different environment make up community.

1) True   2) False
5. The biosphere reaches from the floor of oceans to the tops of high mountains.

1) True   2) False
6. Algae are the most important producers in land ecosystem.

1) False   2) True
7. The animals that feed on plants are called secondary consumers.

1) True   2) False
8. Lion, snakes, hawks are the example of decomposers.

1) False   2) True
9. Decomposers are the first component of food chain.

1) True   2) False
10. Sun produces the energy for the survival of ecosystem.

1) False   2) True
11. Diatoms are important producers in land ecosystem.

1) False   2) True
12. The passage of energy in a one way direction through the ecosystem is known as energy flow.

1) False   2) True
13. The process by which plants absorb ammonia and nitrate is called denitrification.

1) True   2) False
14. Nitrogen is important for organisms as it is an essential part of proteins.

1) True   2) False
15. Only 2 % of H2O is present in fresh water lakes takes ponds and rivers on earth.

1) False   2) True
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