The number and types of organisms present on Earth refer to:

The largely tropical ............. rain forest in South America has the greatest biodiversity on earth.

Which of the following is correctly matched?
$I$. Alpha diversity - Number of species in a given habitat
$II$. Genetic diversity - Variation of the genes within species
$III$. Beta diversity - Diversity of the habitat in the whole region
$IV$. Species diversity - Product of the species richness and evenness

How many megadiverse countries are there in the world?

According to Robert Constanza, the average price tag for ecosystem services is:

Genetic diversity is the measure of