Species which occupy a similar ecological niche in similar communities occupying different biogeographical regions are called:

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

Temperature regulation is found in

Organisms which can tolerate and thrive in a wide range of temperature are called .......... e.g. .........

Planktons are organisms which:

Consider the following four statements $(a-d)$ regarding certain desert animals like the kangaroo rat:
$(a)$ They have a dark color and high rate of reproduction and excrete solid urine.
$(b)$ They do not drink water,breathe at a slow rate to conserve water,and their body is covered with thick hair.
$(c)$ They feed on dry seeds and do not require drinking water.
$(d)$ They excrete very concentrated urine and do not use water to regulate body temperature.
Which two of the above statements are true?