NEET · Biology · STD 12 - 13. biodiversity and conservation

"The Evil Quartet" of biodiversity loss includes which of the following?

A Over-exploitation; Alien species invasions; Air pollution; Co-extinctions
B Habitat loss and fragmentation; Air pollution; Water pollution; Co-extinctions
C Habitat loss and fragmentation; over-exploitation; Alien species invasions; Co-extinctions
D Over-exploitation; Alien species invasions; Soil pollution; Co-extinctions

Verified Solution

Answer & Solution

Correct Answer

(C) Habitat loss and fragmentation; over-exploitation; Alien species invasions; Co-extinctions

Step-by-step Solution

Detailed explanation

(C) Habitat loss and fragmentation; over-exploitation; Alien species invasions; Co-extinctions
The term 'The Evil Quartet' is used to describe the four major causes of biodiversity loss.
These four causes are:
(A) Habitat loss and fragmentation
(B) Over-exploitation
(C) Alien species invasions
(D) Co-extinctions
Pollution (air, water, or soil) is not considered one of the four components of 'The Evil Quartet'.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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Match List I with List II :

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A. Nicotine	I. Causes sense of euphoria and increased energy
B. Morphine	II. Stimulates adrenal gland to release catecholamines into blood circulation
C. Heroin	III. Effective sedative and painkiller
D. Cocaine	IV. A depressant; slows down body function

Choose the correct answer from the options given below :

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