The term $Biodiversity$ was popularized by $........$.

How many varieties of rice have been estimated to be present in India?

Select the correct statement regarding biodiversity.

Tropical regions show the greatest level of species richness because:
$A$. Tropical latitudes have remained relatively undisturbed for millions of years,hence more time was available for species diversification.
$B$. Tropical environments are more seasonal.
$C$. More solar energy is available in the tropics.
$D$. Constant environments promote niche specialization.
$E$. Tropical environments are constant and predictable.
Choose the correct answer from the options given below.

Alexander von Humboldt described for the first time

Western Ghats have a large number of plant and animal species that are not found anywhere else. Which of the following terms is used to denote such species?