Which of the following statements is/are colrect? (A) The BOD (Biological Oxygen Demand) of sewage water is very high (B) The aerobic organisms rapidly increase in sewage water due to low content of dissolved oxygen (C) Ecology is the study of interrelationship between the organisms and their physical environment (D) Parasites are those organisms, which do not depend on other living organisms for their food Choose the correct answer from the options given below:
(A) and (C) only
Untreated sewage normally has high BOD because microbial decomposition of organic matter consumes oxygen. Low dissolved oxygen limits aerobic organisms, so B is false. Ecology studies organisms’ relationships with their environment, making C true; parasites depend on hosts, so D is false. Only A and C are correct.
Important Questions from Environment
- The evolution of environmental hazard paradigms.
List-I
(Period)List-II
(Paradigm)A. Pre-1950 I. Behavioral B. 1950-70 II. Development C. 1970-90 III. Engineering D. 1990 onwards IV. Complexity
Choose the correct answer from the options given below : - Which city was reported among the top 10 most polluted cities in the world on December 28, 2025?
The main objective of the Public Liability Insurance Act is to provide immediate relief for the victims who suffer from the accidents involving______.
- The functions of the State Pollution Control Board are laid down under __________ of the Water (Prevention and Control of Pollution) Act, 1974.
Consider the following pairs :
1. Advika: Chickpea
2. Panchamrit: India's Climate Action Plan
3. Mission Life: Life Style in harmony with ecological well-being
How many of the above pairs are correctly matched?
