Desertification is cause by___ A) temperature variations

B) solar heating patterns

C) leaching of the soil

D) human activity

What are the four basic classes of organic molecules how do they differ structurally and functionally

How is mitosis different in plants and animals? a. in animals, the cell membrane pinches together. b. in plants,the dna is one circular chromosomes. c. in plants, there are no sister chromatids. d. in animals, a new cell wall forms.

Moving down the ramp from 6 meters to