ECOSYSTEM (Part-II)

Total Questions: 40

1. When the air gets contaminated by such unwanted substances, which are harmful to both living and non-living. It is called _____ . [S.S.C. Online MTS (T-I) 17.09.2017 (Shift-I)]

(a) water pollution
(b) air pollution
(c) noise pollution
(d) Soil pollution

Correct Answer: (b) air pollution

Solution:Air pollution.
This is the definition of air pollution: the presence of harmful substances in the air that can cause adverse effects on humans, animals, plants, and other materials.

2. Sulphur Dioxide pollution is indicated by an excessive growth of which of the following? [S.S.C. Online CHSL (T-I) 7.01.2017 (Shift-III)]

(a) Algal Blooms
(b) Lichens
(c) Bryophytes
(d) Protozoa

Correct Answer: (b) Lichens

Solution:Lichens.
Lichens are excellent bioindicators of air quality, and their absence or stunted growth is often an indicator of sulfur dioxide pollution, not excessive growth. However, if the question implies a lack of excessive growth in polluted areas, then lichens are still the correct indicator organism for sulfur dioxide. If it's a trick question implying that a different organism would grow excessively due to sulfur dioxide, that's not typical. Given the options, lichens are the most relevant.

3. Which industry mainly produces bio-pollutant cellulose fibers? [S.S.C. Online C.P.O.S.I. (T-I) 7.07.2017 (Shift-I)]

I. Mining Industry
II. Soap and detergent industry
III. paper and pulp industry

(a) I only
(b) II only
(c) III only
(d) Both II and III

Correct Answer: (c) III only

Solution:

Paper and pulp industry
The paper and pulp industry is the primary producer of cellulose fibers, and its waste can be a significant source of bio-pollutants if not properly treated.

4. The systematic name of which compound is nitrogen trihydride that is widely used in many industrial processes, and as a fertiliser and refrigerant? [S.S.C. Online CHSL (T-I) 03.06.2022 (Shift-II)]

(a) Ammonia
(b) Potash
(c) Urea
(d) Phosphine

Correct Answer: (a) Ammonia

Solution:Ammonia.
Nitrogen trihydride is the systematic chemical name for ammonia (

N H₃

). Ammonia is indeed widely used in industrial processes, as a fertilizer, and as a refrigerant.

5. Which of the following is/are correct? [S.S.C. Online C.P.O.S.I. (T-I) 3.07.2017 (Shift-II)]

(a) SPM - suspended particulate matter
(b) COD - Chemical Oxygen Demand
(c) SPM - Suspended particulate matter and COD, both chemical oxygen demand
(d) None of these

Correct Answer: (c) SPM - Suspended particulate matter and COD, both chemical oxygen demand

Solution:The full form of COD is Chemical Oxygen Demand, and the full form of SPM is Suspended Particulate Matter.

6. The narrow area of contact between land, air, and water is called ____ . [S.S.C. Online MTS (T-I) 21.08.2019 (Shift-II)]

(a) Lithosphere
(b) biosphere
(c) Atmosphere
(d) hydrosphere

Correct Answer: (b) biosphere

Solution:Biosphere.
The biosphere is the global ecological system integrating all living beings and their relationships, including their interaction with the elements of the lithosphere (land), hydrosphere (water), and atmosphere (air). It's the region of Earth where life exists.

7. There is a limited area, where land, water, and air meet together, in which all kinds of organisms are found is called— [S.S.C. Online MTS (T-I) 11.10.2017 (Shift-I)]

(a) Earth
(b) Atmosphere
(c) Biosphere
(d) Hydrosphere

Correct Answer: (c) Biosphere

Solution:Biosphere. This question reiterates the definition of the biosphere, which is the sum of all ecosystems on Earth, the zone of life on Earth, encompassing the interaction of land, water, and air.

8. Heat is which component of habitat? [S.S.C. Online MTS (T-I) 9.10.2017 (Shift-I)]

(a) Biotic component
(b) Abiotic component
(c) Both Biotic and Abiotic component
(d) Neither of the two components

Correct Answer: (b) Abiotic component

Solution:Abiotic component.
Habitat components are divided into biotic (living) and abiotic (non-living). Heat, along with light, water, soil, and minerals, are non-living physical and chemical factors, making them abiotic components.

9. Which is/are biotic components? [S.S.C. Online MTS (T-I) 6.10.2017 (Shift-I)]

I. Plants
II. Animals
III. Soil

(a) Only I
(b) Only II
(c) Both I and II
(d) All II and III

Correct Answer: (c) Both I and II

Solution:The ecosystem is a composition made up of biotic and abiotic components. For example, plants and animals are biotic or abiotic components, whereas soil, air, sunlight, water, heat, organic and inorganic substances, etc., are biotic or abiotic components.

10. Which of the following is not considered a part of the Abiotic Environment? [S.S.C. Online CHSL (T-I) 7.02.2017 (Shift-III)]

(a) Plants
(b) Air
(c) Water
(d) Soil

Correct Answer: (a) Plants

Solution:Plants: Are living organisms, making them a part of the biotic environment.

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