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 results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus. It is involved in growth and repair. A leaf growing is an example of mitosis at work as new cells are produced through mitosis to increase the size of the leaf. Leaf turning yellow is related to pigment - change processes like chlorophyll breakdown. Taking in carbon dioxide and performing photosynthesis are related to the plant's metabolic processes for energy production and not directly to mitosis.

Answer:

growing.