For an average human fibroblast, the time taken for a cell to divide into two daughter cells is between 18 and 24 hours. In a laboratory experiment, human fibroblast cells are exposed to growth factors for one hour, and then a compound that inhibits cyclin-dependent kinases (CDK) is added to the cells. Which of the following statements best describes the state of fibroblast cells after addition of the CDK inhibitor?

A) The fibroblasts fail to go through the G1 checkpoint and remain in the G1 phase.
B) The fibroblasts fail to go through the G2 checkpoint and remain in the G2 phase.
C) The fibroblasts have passed the G1 checkpoint and have entered the S phase, where they remain.
D) The fibroblasts have passed the G1 and G2 checkpoints and have entered the M phase, where they remain.

increase soil erosion                                             reduce soil erosion

cattle grazing                                                         hydroseeding

deforestation                                                         contour plowing

                                                                                planting vegetation

plant roots basically hold the top soil

together and stop soil erosion because

in such situation top soil is not removed

during flood but cattle grazing causes

soil erosion because cattle consume the

grasses and herbs and top soil is exposed.

same situation occurs because of

deforestation, the trees and plants are cut

down to expose top soil which causes soil

erosion

i tried the eyeshadow trick you told me about and it worked so good i i did a yellow going into orange colors and it was bright and you could see it on my eyes

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.