Why must plants have a constant source of carbon dioxide? A: It is utilized in the process of photosynthesis to make glucose
B: It is the final acceptor at the end of the Calvin cycle.
C: It acts as a coenzyme in the process of photosynthesis.
D: It is utilized in the synthesis of chlorophyll.

i am going to guess that it is co2.

it's the cell cycle, but cytokines is when the cell divides.

theres 3 stages interphase,mitosis,and cytokines.

interphase prepares the cell for division.

mitosis is the process of dividing the cell,it has 4 parts interphase,anaphase,metaphase,and telophase.

lastly there's cytokines,that's when the cell divides into 2 daughter cells