What is the full form of $UNESCO$?

The 'Rivet Popper' hypothesis was proposed by $................$.

How many biodiversity hot spots have been identified in the world?

The reasons behind conserving biodiversity can be grouped into categories,which includes?
$I$. Broadly utilitarian
$II$. Narrowly utilitarian
$III$. No utilitarian
$IV$. Ethical utilitarian
Choose the correct option.

Which type of biodiversity refers to the variety of ecosystems in a region?

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