Cell is the structure used
The answer is B, cellular function
ATP provides CHEMICAL ENERGY to drive chemical reactions for the cell.
Algae, just like plants, make food using their chlorophyll and chloroplasts in a process called photosynthesis. <span>Chlorophyll captures the Sun's energy and uses it to make sugars out of carbon dioxide from the air and water. The sugar is energy for the algae to continue producing sugar and growing. :)</span>
I would say similar, since because they express the same genes they have something in common
