Most animals are tree dwellers in a

Many tribes live in the high altitude of the Himalayas. What physiological adaptation do they exhibit?

Large size of pinnae in animals of warm regions in comparison to animals of cold regions is due to:

The Netherlands is a small country,yet it has a high population density. What is the most likely reason for this?

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.

What percentage of species are included in conformers (in $\%$)?