Eurythermal organisms are those which

Give scientific reasons: Mango trees do not grow in countries like Canada and Germany.

In which of the following natural habitats is it possible for only one type of species to reside?

Read the following statements with respect to the features of biomes and select the correct option for tropical rain forests:
$a.$ Buttress roots
$b.$ Vines,lianas and epiphytes are abundant
$c.$ Highly leached soils
$d.$ Soil has high base content
$e.$ $30-40 \; m$ tall canopy structure with $2-3$ strata only

Organisms restricted to a narrow range of salinity are $- P$.
Organisms that tolerate a wide range of salinity are $- Q$.
Choose the correct option for $P$ and $Q$.
$P$ $Q$

In plants,which of the following explains their functions and characteristics?