Final answer:
The end products of photosynthesis are sugars/carbohydrates and oxygen, with water and carbon dioxide being the primary reactants and chlorophyll being an essential component for both plants and cyanobacteria.
Step-by-step explanation:
The end product of photosynthesis is sugars/carbohydrates and oxygen. In photosynthesis, water and carbon dioxide are the reactants, and the main products are glyceraldehyde-3-phosphate (GA3P), which is a sugar, and oxygen. Cyanobacteria, like plants, utilize chlorophyll for photosynthesis but do not have chloroplasts, which are specific to eukaryotic plant cells.