Practicing Success

Target Exam

CUET

Subject

Biology

Chapter

Biodiversity and Conservation

Question:

Which of the following is referred as " The Evil Quartet "with reference to loss of biodiversity ?

Options:

Deforestation , habitat destruction, grazing, species richness .

Extinction, species richness, erosion , decomposition.

Habitat loss and fragmentation, co-extinctions, alien species invasions, over-exploitation.

Over-exploitation, grazing, deforestation, extinction .

Correct Answer:

Habitat loss and fragmentation, co-extinctions, alien species invasions, over-exploitation.

Explanation:

The correct answer is Option (3) - Habitat loss and fragmentation, co-extinctions, alien species invasions, over-exploitation.

The accelerated rates of species extinctions that the world is facing now are largely due to human activities. There are four major causes (‘ The Evil Quartet ’ is the sobriquet used to describe them).

(i) Habitat loss and fragmentation

(ii) Over-exploitation

(iii) Alien species invasions

(iv) Co-extinctions