Succulent xerophytes are likely to be found in

Read the following statements and select the option that represents the correct statements.
$(1)$ Kangaroo rats never drink water.
$(2)$ Birds undergo hibernation to escape adverse environmental conditions.
$(3)$ Thermal adaptation can be explained by Allen's Rule.
$(4)$ Opuntia possesses phylloclade for protection.

Ecological hierarchy comprises which of the following sequences?

Read the given statements and determine how many of them are incorrect.
$(1)$ Regional and local variations in habitats create a wide variety of biomes.
$(2)$ Temperature,light,and soil are the key elements for the physical and chemical variations in an ecosystem.
$(3)$ Tuna fish are found in the ocean and are classified as warm-blooded and homeothermic animals.
$(4)$ Red algae are found in the deep-sea regions.

The ecological niche of a population is a

Alpine forests occur at altitudes of: