I had a abnormal c x-ray it showed a density in the retrocardic area of lungs what does it mean? Dr. John Chiu Dr. Chiu See doctor: You need to discuss this with your doctor since there are many types of densities which signify different things.
Relevance. Rating Newest Oldest. Best Answer: As said before, photosynthesis does not produce water, it uses the sun's energy to combine carbon dioxide and water to produce carbohydrates and gives off oxygen as a by-product.
The plant must create its own energy in order to survive. Photosynthesis is the process by which new lease of energy is made available to the plant. For photosynthesis, plants need light, water, carbon dioxide and chlorophyll. The chlorophyll converts water from soil and carbon dioxide from air into oxygen and sugar in the presence of sunlight.