What regulates the flow of water through a cell membrane

Which element is found in both dna and proteins

In this case, the statement that people who exercise for an hour may have lower cholesterol levels is .

Ascience research group is testing a new type of plant food. one trial is conducted in a controlled experiment. the data from the trial show that the plant that received the new food grew faster than the control plant. the group announces that the new plant food makes plants grow faster. what is the main weakness in this scientific claim?