Which of the following are examples of subspecies that have recently gone extinct?
$(a)$ Caspian
$(b)$ Russian
$(c)$ Bali
$(d)$ Quagga

What is the primary reason for the continuous decline in the population of wildlife?

Which of the following is an exotic species?

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.

Biodiversity loss occurs due to the reasons given below:
$(i)$ Habitat loss and fragmentation
$(ii)$ Co-extinction
$(iii)$ Over-exploitation
$(iv)$ Alien species invasion
Identify the correct reasons.

"When a host fish species becomes extinct, its unique assemblage of parasites also meets the same fate." This is an example of ........