Sediment is formed by a) soil erosion. b) weathered rock. c) burial and melting. d) deposited snow and ice.

How many chromosomes does each human cell contain? a. 23 chromosomes b. 26 chromosomes c. 43 chromosomes d. 46 chromosomes

Which line in the graph above best illustrates an effect of the carbon dioxide level in the blood on breathing rate before, during and after a period of exercise? 1.b,2.c,3.a,4.d

3differences between bacteria and other 2 cells