The Russian species that became extinct in recent years is . . . . . . .

$A$: The process of extinction is random and fast.
$R$: Any species not adapted to environmental conditions cannot survive.

When a species becomes extinct,the plant and animal species associated with it in an obligatory way also become extinct. This phenomenon is known as:

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.

Identify the incorrect match with respect to recently extinct animals and their place of extinction according to the $IUCN$ Red List.

Why do exotic species sometimes become invasive and start spreading rapidly?