Which of the following is a characteristic of a biological community?

$I.$ Biochemical adaptations are seen in organisms living at great depths of the ocean to face crushing pressure.
$II.$ Allen's rule explains adaptations in mammals living in colder climates.
$III.$ Altitude sickness is caused because the body does not get enough oxygen due to low atmospheric pressure at high altitudes.
$IV.$ Desert lizards lack behavioural means to manage their body temperature.
Choose the correct option for the above statements.

The biome characterized by a layer of permafrost is known as:

Provide information about the natural habitats of organisms.

What is homeostasis? Define aestivation.

Which biome is characterized by evergreen vegetation and drought-adapted animals?