Question

Which is an endemic plant?
A. Nepenthes Khasiana
B. Riccia discolor
C. Vernonia cinerea
D. Cynodon dactylon

Answer 1

Hint:
> Endemism is the ecological state of species that are endemic to a particular geographic location such as island, nation or country or their habitat.
> These species are known as endemic species.
> Endemic mainly stands for indigenous.

Complete answer:
Endemic species are the special type of species that are confined to a particular place and are not found anywhere else in the world.
For example: Kangaroo is only found in Australia and is nowhere else in the world.
Animals and plants can become endemic in two general ways.
1. Some evolve in a particular place and adapt to the local environment and continue to live within the area of that environment.
2. An "allochthonous" endemic species, by contrast, originated somewhere else but has lost most of its earlier geographic range.
Son, according to the question, option A is Nepenthes Khasiana.
Nepenthe Khasiana is an endemic plant to India.
It is the only species of pitcher plant which is endemic to our country.
The more endemic species of particular places are the biodiversity of that place.
Option B: Riccia discolor is the genus of liverworts.
These plants are small and thalloid and are not differentiated into roots, stem and leaves.
This species was found floating in the ponds.
Option C: Vernonia cinerea is also known as ash colored speedwell.
It is a herbaceous perennial plant which is found in Nepal.
It acts as the folk medicine in Nepal.
Option D: Cynodon dactylon is also known as bermuda grass.
This is the grass which is native to most of the eastern hemisphere.
It is an abundant invasive species.

So, the correct option is option A. Nepenthes Khasiana.

Note: Endemic species can easily become endangered or extinct if their already restricted habitat changes, particularly but not only due to human actions, including the introduction of new species.
 For example: Dodo, a flightless bird species endemic to Mauritius in the Indian Ocean.
Dodo was last seen in 1688.