Rauwolfia vomitoria shows genetic variation in:

What is the true approximate percentage of the earth's land area covered by biodiversity hot spots?

Given below are two statements.
Statement-$I$: Genetic diversity is the diversity in the number and type of genes as well as chromosomes present in the same species and variations in the genes and their alleles.
Statement-$II$: Species diversity deals with the variety of species as well as the number of individuals of different species observed in an area.
In light of the above statements,select the correct answer from the options given below.

Which of the following represent the maximum number of species among global biodiversity?

$X$ - India has $2.4\%$ of the world's land area.
$Y$ - The diversity of plants and animals is not uniform throughout the world but shows a rather uneven distribution.
$Z$ - Species-area relationships were given by Alexander von Humboldt.
Identify the truth value of $X, Y,$ and $Z$ respectively.

The term 'Alpha diversity' refers to