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CSAT Prelims Ecology - General Knowledge Questions and Answers for UPSC Exam | Page-5

Questions
41 The 2004 Tsunami made people realize that mangroves calamities. How to mangroves function as a safety hedge?
A The mangroves trees do not get uprooted by storms tides because of their extensive roots.
B The mangroves trees are tall with dense canopies and tsunami
C The mangroves provide both food and medicines which people are in need of after any natural disaster
D The mangroves swamps separate the human settlements from the sea by a wide zone in which people neither live more venture out.

Answer: Option [A]
42 Two important rivers-one with its source in Jharkhand( and known by a different name in Odisha), and another, with its source in Odisha- merge at a place only a short distance from the coast of Bay important site of wildlife and biodiversity and a protected area. Which one of the following could be this?
A Simlipal
B Gopalpur- on- sea
C Chandipur- on- sea
D Bhitarkanika

Answer: Option [D]
43 With reference to India, consider the following Central Acts:
I. Import and Export (Control) Act, 1947
II. Mining and Mineral Development (Regulation) Act, 1957
III. Customs Act, 1927

Which of the above Acts have relevance to/ bearing on the biodiversity conservation in the country?

A I and II only
B II, III and IV only
C I, II, III and IV only
D None of the above Acts

Answer: Option [C]
44 Biomass gasification is considered to be one of the sustainable solution to the power crisis in India. In this context, which of the following statements is/ are correct?
I. Coconut shells, groundnut shells and rice husk can be used in biomass gasification.
II. The combustible gases generated from biomass gasification can be used for direct heat generation but not in internal combustion engines.
III. The combustible gases generated from biomass gasification consist of hydrogen and carbon dioxide only.

Select of the correct answer using the codes given below:

A I and II only
B II and III only
C I and III only
D I, II and III

Answer: Option [A]
45 Which of the following can be found as pollutants in the drinking water in some parts of India?
I. Arsenic
II. Sobitol
III. Fluoride
IV. Formaldehyde

Select the correct answer using the codes given below.

A I and III only
B II, III and IV only
C I, II and III only
D I, II, III and IV

Answer: Option [A]
46 Brominated flame retardants are used in many household products like mattresses and upholstery. Why is there some concern about their use?
I. They are highly retardant to degradation in the environment.
II. They are able to accumulate in humans and animals.

Select the correct answer using the code given below.

A I only
B II only
C Both I and II
D Neither I nor II

Answer: Option [B]
47 The scientific view is that the increase in global temperature should not exceed 20C above pre-industrial level. If the global temperature increase beyond 30C above the pre-industrial level, what can be its possible impact/ impacts on the world?
I. Widespread coral mortality will occur.
II. All the global wetlands will permanently disappear.
III. Terrestrial biosphere tends towards a net carbon source.
IV. Cultivation of cereals will not be possible anywhere in the world.

Select the correct answer using the code given below.

A I only
B I and II only
C II, III and IV only
D I, II, III and IV

Answer: Option [D]
48 Which one of the following is the national aquatic animal of India?
A Gharial
B Gangetic dolphin
C Olive ridley turtle
D Saltwater crocodile

Answer: Option [B]
49 Consider the following protected areas:
I. Bandipur
II. Bhitarkanika
III. Manas
IV. Sunderbans

Which of the above are declared Tiger Reserves?

A I and II only
B I, III and IV only
C II, III and IV only
D I, II, III and IV

Answer: Option [B]
50 There is a concern over the increase in harmful algal blooms in the seawaters of India. What could be the causative factors for this phenomenon?
I. Discharge of nutrients from the estuaries.
II. Run- off from the land during the monsoon.
III. Upwelling in the seas.

Select the correct answer from the codes given below:

A I only
B I and II only
C II and III only
D I, II and III

Answer: Option [D]

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