Curious carl, a biology major, conducted research on the daily habits of black bears

About how many years does it take for one cycle of surface water to become deep water and then surface water again in the oceans? 101001,000

Consider the following planned experiment. factor experimental group control group light exposure tots of sun tots of sun amount of water weekly weekly type of soil nutrient rich nutrient rich size of pot large which variable is being tested in this experiment? small a. size of pot b. type of soil c. light exposure d. amount of water

Some substances but not other can cross the (blank) membrane of a cell