Which of the following is an exotic species?

How is the presently occurring species extinction different from the earlier mass extinctions?

Assertion: Tropical rain forests are disappearing fast from developing countries such as India.
Reason: No value is attached to these forests because these are poor in biodiversity.

Which of the following is a human-induced cause for the extinction of plant species?

The 'Evil Quartet' refers to $..............$

Which of the following statements is correct regarding Parthenium (Carrot grass)?
$(a)$ It was introduced into India as a contaminant with imported wheat.
$(b)$ It causes allergies.
$(c)$ Asexual reproduction occurs in its flower.