Q. With reference to “Senna Spectabilis” consider the following statements:
1.It is a keystone species found in India.
2.The thick foliage of the tree affects the growth of other indigenous tree and grass species.
3.It affects the germination and growth of native species.
Which of the statements given above are correct?

[A] 1 and 2 only

[B] 2 and 3 only

[C] 1 and 3 only

[D] 1, 2 and 3

Answer: B
Notes:

Explanation –

Statement 1 is incorrect. Senna Spectabilis is an invasive species in India.

Statement 2 and 3 are correct. The thick foliage of the tree affects the growth of other indigenous tree and grass species. It affects the germination and growth of native species.

Source: ForumIAS