James was observing cells under a microscope. he observed some cells which had a layer outside the plasma membrane. what is this layer called?
a. cell membrane
b. cell wall
c. nuclear membrane

where in your body is there an enzyme that does function at a high or low ph? what is the name of that enzyme and its function?

the answer is z.

the human body has five levels of organization. level 1: cells. cells are the basic units of life and form the first level of organization. cells in the human body have specific functions. examples include nerve cells, blood cells, liver cells, and so on.