Endemic plants are those,which are

Which of the following regions is $NOT$ a biodiversity hotspot?

In global biodiversity of plants,which of the following statements is correct?

Define/Explain: Endemic species.

The Amazon rainforest is home to more than $...........$ species of invertebrates.

Identify the correct statements :
$1.$ According to $\text{IUCN} (2004)$,the total number of described species is slightly more than $1.5$ million.
$2.$ Robert May estimated the total species diversity on Earth to be around $7$ billion.
$3.$ Insects make up more than $70 \%$ of all recorded animal species.
$4.$ India,with $2.4 \%$ of the world's land area,contributes $8.1 \%$ to global species diversity.