What would happen without excretory systems in humans? a) wastes would build up in blood and damage the body. b) blood would not circulate through the body. eliminate c) oxygen would not enter the blood stream. d) nutrients would not be absorbed.

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.

the offspring would all be white. if the parents are both white flowers then they have the genotype rr, which when crossed results in an all white punnet square.