ANSWER: Yes, plants also require carbohydrates, proteins, and fats, but they prepare them on their own. Through photosynthesis, plants make glucose (a carbohydrate), which provides energy and acts as the basic raw material. Proteins are formed when plants absorb nitrates from soil, which combine with glucose to produce amino acids and then proteins. Fats are produced when glycerol and fatty acids are synthesised inside plant cells using carbohydrates. Unlike humans, plants are autotrophs, so they manufacture these nutrients internally rather than consuming them.