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UPSC CAPF AC Paper - I
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In an ecotone, the species which become abundant are called:

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Important Questions on Environment & Ecology

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UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 6 - Environment & Ecology>Exercise 1>Q 78
The word 'ecosystem' was coined by
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UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 6 - Environment & Ecology>Exercise 1>Q 79
The organisms which feed on bodies of the dead organisms are:
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UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 6 - Environment & Ecology>Exercise 1>Q 80

There is a concern over the increase in harmful algal blooms in the sea-waters of India. What could be the causative factors for this phenomenon? 
1. Discharge of nutrients from the estuaries. 
2. Run-off from the land during the monsoon. 
3. Upwelling in the seas. 
Select the correct answer using the codes given below 

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UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 6 - Environment & Ecology>Exercise 1>Q 81
With reference to the food chains in ecosystems, which of the following kinds of an organism is/are known as decomposer organism/organisms?
1. Virus
2. Fungi
3. Bacteria
Select the correct answer using the codes given below:
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UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 6 - Environment & Ecology>Exercise 1>Q 82
With reference to food chains in ecosystems, consider the following statements :
1. A food chain illustrates the order in which a chain of organisms feed upon each other.
2. Food chains are found within the populations of a species.
3. A food chain illustrates the numbers of each organism which are eaten by others.
Which of the statements given above is/are correct?
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UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 6 - Environment & Ecology>Exercise 1>Q 84
An aquatic plant introduced from America to check pollution turned out to be a troublesome weed in Indian water bodies. The name of this 'invasive alien species' is:
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UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 6 - Environment & Ecology>Exercise 1>Q 85

Which among the following within processes helps in evolution?

1. Natural selection

2. Adaptation

3. Mutation

4. Reproductive isolation

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UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 6 - Environment & Ecology>Exercise 1>Q 86
Study of plant communities in relation to their habitats of a given ecosystem is called as: