Which organism does not drink water but uses water produced as a byproduct of its internal metabolic processes?

Small animals have a $......P.......$ surface area relative to their volume, so they lose body heat $.....Q.....$ when it is cold outside.

Why do mammals of colder regions generally have shorter ears and limbs?
$I.$ To minimize their surface area to volume ratio
$II.$ To minimize heat loss
$III.$ To maximize their surface area to volume ratio
$IV.$ To maximize heat loss
Choose the correct combination from the given options:

Which of the following hierarchies is correct with reference to the levels of biological organization?

Ecological hierarchy comprises which of the following sequences?

At what height in the Himalayan region of our country are Taiga forests located?