Which checkpoint requires a cell to be of adequate size in order to move to the next phase in the cell cycle?
a.) g 1/s checkpoint
b.) g 2 gheckpoint
c.) g 0 checkpoint
d.) m checkpoint

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

here's your answer.