How many species in the world are facing the threat of extinction according to the $IUCN$ Red List $(2004)$?

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

Which of the following rain forest is home to more than $40,000$ species of plants,$3,000$ of fishes,$1,300$ of birds,$427$ of mammals,$427$ of amphibians,$378$ of reptiles and more than $125,000$ invertebrates?

Match the following columns:

Column-$I$	Column-$II$
$(P)$ Genetic diversity	$(I)$ Diversity at the genetic level
$(Q)$ Species diversity	$(II)$ Diversity at the species level
$(R)$ Ecological diversity	$(III)$ Diversity at the ecosystem level

India has nearly ..... varieties of plants. (in $,000$)

$X$ - 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.