Answer: yes. ex: cactus. True plants (as opposed to fungus) have chlorophyll in their leaves. They carry out photosynthesis like any other plant, but other chemicals in the leaves mask the chlorophyll, giving the leaf a non-green hue. There is also a species of parasitic dodder (Cuscuta europaea) which does not photosynthesize, and depends on other plants for nutrition.
Answer: Chlorophyll is what plants use to conduct photosynthesis. Chlorophyll makes plants look green so only green plants will have chlorophill in them. Therefore in answer to your question it will just be leafy greens that have chlorophyll in them!
Answer: Chlorophyll is a green chemical inside chloroplasts. It carries out photosynthesis, which makes energy for a plant using sunlight. In fact, when you get a grass stain on your clothes, the green stuff is chlorophyll.