How does planting high-yield crop varieties make farming more sustainable? a. it increases the amount of water needed. b. it keeps soil fertility from diminishing over time. c. it keeps chemicals from entering the watershed. d. it decreases the amount of land needed.

Which of the following is a difference between a food chain and a food web? selected: a. food webs contain both plants and animals. food chains only contain animals.this answer is incorrect. b. food webs show energy transfer. food chains show which animal eats which animal. c. food webs separate organisms by tropic level. food chains do not. d. food webs are a complex patterns of energy flow. food chains only show one line of energy flow.

What drives an advertising campaign?

Which group of molecules are targeted by the kinases in order to control this movement