Which endangered species is used as a medicinal plant?

Of the four major causes for the loss of biodiversity (Alien species invasion,habitat loss and fragmentation,over-exploitation,and co-extinctions),which according to you is the major cause for the loss of biodiversity? Give reasons in support.

"The Evil Quartet" of biodiversity loss includes which of the following?

Select the appropriate option regarding the term 'The Evil Quartet'.

Which one of the following is $NOT$ a natural reason for loss of biodiversity?

The greatest threat to genetic diversity in agricultural crops is