Ecological succession and Forests MCQs with answers and explanations for all examinations.
1. The orderly sequence of change in the vegetation of an area over time is described as which among the following ?
(a) Biomes
(b) Ecological succession
(c) Trophic level
(d) Climax
Correct Answer –Â (b) Succession
2. Consider the following statements:
1. First plant to colonize an area is called the pioneer community.
2. The final stage of succession is called the climax community.
Which of the above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
Correct Answer – (c) Both 1 and 2
3. Consider the following statements:
1. Primary succession takes place over where no community has existed previously.
2. The pioneer species disappear as the habitat conditions change.
Which of the above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
Correct Answer – (c) Both 1 and 2
4. Consider the following statements Secondary succession:
1. It is the sequential development of biotic communities after the complete or partial destruction of the existing community.
2. Unlike in the primary succession, the secondary succession starts on a well-developed soil.
Which of the above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
Correct Answer – (c) Both 1 and 2
5. Consider the following statements:
1. Allogenic succession occurs when biotic factors or organisms themselves drive the succession.
2. Autogenic succession occurs when abiotic factors,or external forces drive the succession.
Which of the above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
Correct Answer – (d) Neither 1 nor 2
6. Teak wood is found in which among the following forests ?
(a) Tropical deciduous forests
(b) Tropical evergreen forests
(c) Montane forests
(d) Temperate evergreen forests
Correct Answer –Â (a) Tropical deciduous forests
7. Rhododendrons are naturally found in which among the following areas ?
(a) Himalayas
(b) Central India
(c) South India
(d) None of the above
Correct Answer –Â (a) Himalayas
8. Hardwood trees like rosewood, ebony, mahogany are generally found in ?
(a) Tropical evergreen forests
(b) Tropical deciduous forests
(c) Temperate Evergreen Forests
(d) Mediterranean Vegetation
Correct Answer –Â (a) Tropical evergreen forests
9. Mediterranean trees have thick barks and wax coated leaves. These features help them to perform which among the following ?
(a) Reduce transpiration
(b) Increase rate of water flow from roots to shoots
(c) Cut down the need for photosynthesis
(d) Increase the area of the leaves to step up glucose intake
Correct Answer –Â (a) Reduce transpiration
10. The process by which an organism maintains a constant internal environment to survive and function despite changes in the external environment is called as ?
(a) Metamorphism
(b) Homeostasis
(c) Autophagy
(d) Mitosis
Correct Answer – (b) HomeostasisÂ
11. Consider the following statements about the Temperate Deciduous Forests:
1. They are found in mid and higher latitudes.
2. Oak, ash and beech trees are generally found here.
Which of the above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
Correct Answer – (c) Both 1 and 2
12. Deforestation affects which among the following soil properties ?
(1) Top soil content
(2) Microbial activity
(3) Nutrient content
(4) Water holding capacity
Select the correct answer using the codes below.
(a) 1, 2 and 3 only
(b) 1, 2 and 4 only
(c) 2 and 3 only
(d) All of the above
Correct Answer –Â (d) All of the above
13. Forest fires are major environmental concern as they can lead to:
1. Loss of valuable timber resources
2. Loss of wildlife habitat
3. Global warming
Select the correct answer using the codes below.
(a) 1 only
(b) 1 and 2 only
(c) 2 and 3 only
(d) All of the above
Correct Answer –Â (d) All of the above
14. Consider the following statements about the ‘Sundarbans’:
1. They host a large population of mangroves.
2. They are under threat due to freshwater flows from Brahmaputra and Meghna rivers.
Which of the above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
Correct Answer – (a) 1 only
15. If a tropical rainforest is removed, it does not regenerate quickly as compared to a tropical deciduous forest. This is because of the following reasons ?
(a) The soil of rainforest is deficient in nutrients
(b) The trees in a rainforest have poor viability
(c) The rain forest species are naturally slow-growing
(d) Invasive species invade the fertile soil of rainforest
Correct Answer – (a) The soil of rainforest is deficient in nutrients
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