With reference to Keystone Species, consider the following statements:

1. They have a disproportionately large impact on their ecosystem relative to their abundance.
2. Removal of a keystone species may cause ecosystem collapse.
3. All apex predators are keystone species.

Which of the statements given above is/are correct?

A) 1 and 2 only

B) 2 and 3 only

C) 1 only

D) 1, 2 and 3

This MCQ is part of the UP PCS Prelims Mock Tests – March 2026 series, focusing on UP PCS Prelims Mock Tests – March 2026 | Test 1