The forests near the equator are known as .....

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 $Q$.
$P$ $Q$

Invertebrates living in the deep sea, at extreme depths, experience pressure how many times greater than the normal atmospheric pressure (in $\times$)?

Match Column-$I$ with Column-$II$ and choose the correct option.

Column-$I$	Column-$II$
$a.$ Aestivation	$(i)$ Over wintering
$b.$ Hibernation	$(ii)$ Over summer
$c.$ Diapause	$(iii)$ Suspended development in zooplanktons

The treeless biome of cold climates is:

Altitude sickness,which includes nausea,fatigue,and heart palpitations,occurs due to: