More than . . . . . . $\;\%$ of the drugs currently sold in the market worldwide are derived from plants.

Where are the Cardamom Hills located?

How many species of plants contribute to the traditional medicines used by native peoples around the world?

In the equation $S = CA^z$,where $S =$ species richness,$A =$ area,$Z =$ slope of the line,and $C =$ $Y$-intercept. If area is on the $X$-axis and species richness is on the $Y$-axis,what will the graph of $S = CA^z$ look like?

What is the proportion of Arthropods among animal species?

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.