Answer;
The substance that can enter a cell by diffusion without having to be digested is water.
Explanation;
Diffusion involves the movement of molecules from a region of high concentration to a region of low concentration, down a concentration gradient.
Water is able to diffuse through the cell membrane without being digested since it has small molecules.
One property of cell membrane is semi-permeability; it selectively allows material to enter or leave the cell. Large molecules such as starch , fat and proteins, can not enter the cell due to their size and will need to be digested to small molecules for the to gain access to the cell.
<span>The best definition of a fossil is any trace of an organism that lived in the past. Technically, a couple of the other choices (i.e. trace of an organism turned to rock, a hard part of an organism that has been preserved) could be considered within this group.</span>
Answer:
one way of the planet heating up is the fumes of are vehicles it pollutes the ozone layer there for making it slowly go away the ozone layer keeps some of the suns heat out and when its going away its making more heat come through i am not shore if its right but hope it helps and i am also in 11th grade so i know a little
Explanation:
Answer: A. Thyroid Gland
Explanation: The thyroid gland regulates the body's metabolism, while parathyroid glands regulate calcium levels and have no effect on metabolism. Parathyroid hormone (PTH) has a very powerful influence on the cells of your bones by causing them to release their calcium into the bloodstream.
Answer:
extinction
Explanation:
I assume this is the word your looking for
