Question

an example of mitosis at work is a leaf turning yellow. growing. taking in carbon dioxide. performing photosynthesis.

Explanation:

Mitosis is a type of cell - division that leads to growth. A leaf growing is due to the increase in the number of cells through mitosis. A leaf turning yellow is related to pigment changes like chlorophyll breakdown. Taking in carbon dioxide and performing photosynthesis are functions related to the leaf's metabolic processes for energy production, not directly to mitosis.

Answer:

growing