Which of the following statements about biodiversity are correct?

1.Biodiversity can support ecosystem stability

2.Human activities have sharply increased species extinctions

3.Habitat fragmentation has no adverse impact on biodiversity

4.About 70 percent of all known species are invertebrates

A1, 2 and 3 only

B1, 2 and 4 only ✓ Correct

C2, 3 and 4 only

D1, 3 and 4 only

Correct answer: (B) 1, 2 and 4 only

Explanation

Biodiversity supports ecosystem stability, faces rising human-driven extinction, and is dominated by invertebrates.

Statement 1 is right because diverse ecosystems resist disturbance more resiliently.

Statement 2 is right because human pressure has sharply raised extinction rates.

Statement 4 is right because invertebrates make up roughly seventy percent of known species.

Statement 3 is wrong because habitat fragmentation clearly harms biodiversity.

Fragmentation isolates populations and shrinks their gene pools over time.

Want more like this? Create a free account to practise a full test, track your progress, and get spaced-repetition review.