Which of the following hierarchies is correct with reference to the levels of biological organization?

The part of the earth where life exists is made up of:

Rhododendron is the characteristic vegetation of

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?

Thick cuticle,sunken and scotoactive stomata,$CAM$ photosynthesis,and conversion of leaves into spines are some of the important characters of

How many major biomes are there on Earth in terms of average annual temperature and precipitation?