Which of the following is NOT true about CO 2 and O 2 ? a. O 2 is required by most organisms to produce cellular energy-ATP.
b. 0 2 is produced by plants and other producers by cellular respiration.
c. Both gases move through stomates of plants.
d. C0 2 is utilized by plants to make sugars.

There are few cells in the body that do not undergo mitosis: most somatic cells divide regularly, some more than others. take for example the cells that line the digestive tract. these cells must be frequently replaced because they are constantly eroded by the movement of food through the tract. what mechanism(s) is/are in place to ensure that these cells are exact copies of the mother cell