Which of the following pairs of plants,their habitat,and forest type is correctly matched,where they are typically found to occur?

Which scientist proposed that a population is a group of individuals of the same species?

Most animals are tree dwellers in a

In which of the following is a thick layer of fat (blubber) found under the skin?

$I.$ Many xerophytic plants have thick cuticle on leaf epidermis and sunken stomata.
$II.$ Some xerophytic plants have a special photosynthetic pathway $(CAM)$ that enables their stomata to close during the day.
$III.$ $Opuntia$ has spines (modified leaves) and a photosynthetic phylloclade (stem).
$IV.$ All adaptations are genetically fixed in all organisms.
Choose the combination of correct statements.

Match the following in Column $I$ with the means adopted to tide over periods of unfavorable conditions in Column $II$.

$i$. Birds	$c$. Migration
$ii$. Seeds	$a$. Dormancy
$iii$. Snails	$d$. Aestivation
$iv$. Polar bear	$b$. Hibernation