Which of the following organisms performs photosynthesis?

• A. A human (animal)
• B. A mushroom (fungus)
• C. An amoeba that lacks chloroplasts
• D. A green plant such as a sunflower

Answer: (D)

Verified step by step guidance

1. Understand the process of photosynthesis: it is the biological process by which organisms convert light energy into chemical energy, typically using chlorophyll in chloroplasts to produce glucose and oxygen from carbon dioxide and water.
2. Identify which organisms have the cellular structures necessary for photosynthesis, specifically chloroplasts containing chlorophyll.
3. Evaluate each option: humans (animals) do not have chloroplasts and cannot perform photosynthesis; mushrooms (fungi) also lack chloroplasts and obtain nutrients by decomposition; amoebas without chloroplasts cannot photosynthesize either.
4. Recognize that green plants, such as sunflowers, contain chloroplasts with chlorophyll, enabling them to carry out photosynthesis effectively.
5. Conclude that among the given options, only green plants perform photosynthesis because they possess the required cellular machinery.