Which biome is the richest in terms of animal and plant groups?

In the Amazonian rainforest,at least $.........$ insect species are yet to be discovered and named.

Initially $A$ biodiversity hot spots were identified but subsequently nine more have been added to the list,bringing the total number of biodiversity hot spots in the world to $B$. These hot spots are the regions of accelerated habitat loss. Three of these hot spots—Western Ghats and Sri Lanka,Indo-Burma,and Himalaya—cover our country's exceptionally high biodiversity regions. Although all the biodiversity hot spots put together cover less than $C$ $\%$ of the earth's land area,the number of species they collectively harbour is extremely high,and the strict protection of these hot spots could reduce the ongoing mass extinctions by almost $D$ $\%$. $A, B, C$ and $D$ in the paragraph refer to:

In the $Rivet$ $Popper$ hypothesis,what do the rivets represent?

Which of the following has maximum genetic diversity in India?

How many Biosphere Reserves are there in India?