$A$ biotic community is an assemblage of different .......,whereas the biosphere is an assemblage of all ........

Two or more species occupying identical or overlapping areas are known as

Kangaroo rat is found in .........

Consider the following four statements regarding certain desert animals like the kangaroo rat:
$(a)$ They have a dark color,a high rate of reproduction,and excrete solid urine.
$(b)$ They do not drink water,breathe slowly to conserve water,and their body is covered by thick hair.
$(c)$ They use dry seeds as food 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 for such animals?

Plains with snow,ice,and frozen soil for most of the year are found in

Which is the correct order of ecological hierarchy?