A population cycle is

the calvin cycle has three stages. in stage 1, the enzyme rubisco incorporates carbon dioxide into an organic molecule. in stage 2, the organic molecule is reduced. in stage 3, rubp, the molecule that starts the cycle, is regenerated so that the cycle can continue

population. population is the number of people or animals in a particular place. an example of population is over eight million people living in new york city.

here is your answer hope i .