Previous year MCQs

Environment & Ecology UPPSC 2021 GS-I
Question

Given below are two statements, one is labelled as Assertion (A) and other as Reason (R) :

Assertion (A) : Various components of an ecosystem are not interdependent,
Reason (R) : Human activities have an impact on the environment.

Answer & Solution

Answer: (Detailed Solution Below)

Option D: (A) is false, but (R) is true

Detailed Solution:

The correct answer is “(A) is false, but (R) is true”.
Ecosystems are highly interconnected and interdependent. Each component, from producers to decomposers, plays a crucial role in maintaining the balance and functioning of the ecosystem.

Human activities have a significant impact on the environment, often leading to negative consequences such as pollution, deforestation, and climate change. These actions can disrupt the delicate balance of ecosystems and have far-reaching effects.

Similar Questions:

Blue baby syndrome is due to the presence of which of the following in the blood ?
  1. A) Haemoglobin
  2. B) Methemoglobin
  3. C) Lead
  4. D) Nitrate
Given below are two statements, one is labelled as Assertion (A) and other as Reason (R) :

Assertion (A) : Various components of an ecosystem are not interdependent,
Reason (R) : Human activities have an impact on the environment.
  1. A) Both (A) and (R) are true and (R) is correct explanation of (A)
  2. B) Both (A) and (R) are true, but (R) is not correct explanation of (A)
  3. C) (A) is true, but (R) is false
  4. D) (A) is false, but (R) is true
Acid rain is due to air pollution by
  1. A) Carbon dioxide
  2. B) Carbon monoxide
  3. C) Methane
  4. D) Nitrous oxide and Sulphur dioxide
World Ozone Day is celebrated on
  1. A) 25th December
  2. B) 21 April
  3. C) 16th September
  4. D) 30th January
Which one of the following is NOT correctly matched ?
(Subject) – (Related Articles)
  1. A) The separation of judiciary from executive – Article 50
  2. B) The promotion of educational and economic interests of Scheduled Castes and Scheduled Tribes – Article 46
  3. C) The promotion of Co-operative Societies – Article 43A
  4. D) The organisation of Village Panchayats and enable them to function as the units of self government – Article 40
Which of the following Ramsar site is NOT situated in Uttar Pradesh?
  1. A) Sur Sarovar
  2. B) Samaspur Bird Sanctuary
  3. C) Sarsai Nawar Jheel
  4. D) Surinsar mansar Lakes
Which one of the following is the well known example of bioindicator of air pollution?
  1. A) Lichens
  2. B) Methyl mercury
  3. C) Rose plant
  4. D) Sunflower
With reference to the detailed report of Tiger Census 2018 released by the Government of India in July 2020, which of the following Statement(s) is/are correct?

1. India has 75% of the total global tiger population.
2. Nearly 35% of India's tigers live outside the tiger reserve.

Select the correct answer from the codes given below:
  1. A) 1 Only
  2. B) 2 Only
  3. C) Both 1 and 2
  4. D) Neither 1 nor 2
The country most ravaged by the Tsunami fury was:
  1. A) Australia
  2. B) India
  3. C) Indonesia
  4. D) Thailand
The World Habitat Day is observed on:
  1. A) March 21
  2. B) March 23
  3. C) June 5
  4. D) October 7
Match List-I with List-II and select the correct answer using the codes given below:
(State of India) (Highest Peak)
List I - List II

A) Tamil Nadu - 1) Dhupgarh Peak
B) Rajasthan - 2) Saramati Peak
C) Nagaland - 3) Gurushikhar Peak
D) Madhya Pradesh - 4) Dodda Betta Peak
  1. A) 3, 2, 1, 4
  2. B) 1, 4, 3, 2
  3. C) 4, 2, 3, 1
  4. D) 4, 3, 2, 1
Site of gaseous exchange in lungs is:
  1. A) Tracheoles
  2. B) Bronchioles
  3. C) Pulmonary vein
  4. D) Alveoli