$A$ large number of unknown plant and animal species are believed to be in the ...........

Discuss the diversity of life forms found on our Earth.

$X$ - 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.

Developing or underdeveloped nations are rich in which of the following aspects?

The Amazon rain forest is estimated to produce what percentage of the total oxygen in the Earth's atmosphere through photosynthesis (in $\%$)?

Temperate evergreen forests are found in