The genus $Quercus$ is a dominant component in which of the following?

$A$ community is defined as

Consider the following four statements $(1-4)$ about certain desert animals such as kangaroo rat.
$(1)$ They have dark colour and high rate of reproduction and excrete solid urine.
$(2)$ They do not drink water,breathe at a slow rate to conserve water and have their body covered with thick hairs.
$(3)$ They feed on dry seeds and do not require drinking water.
$(4)$ They excrete very concentrated urine and do not use water to regulate body temperature.
Which two of the above statements for such animals are true?

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

Definition / Explanation: Poikilotherms

Which rule states that mammals living in colder climates generally have shorter ears and limbs to minimize heat loss?