AP BIOLOGY

Detailed explanation-1: -The vast majority of energy that exists in food webs originates from the sun and is converted (transformed) into chemical energy by the process of photosynthesis in plants. A small proportion of this chemical energy is transformed directly into heat when compounds are broken down during respiration in plants.

Detailed explanation-2: -Energy from the Sun fuels life on Earth Sunlight allows plants, algae and cyanobacteria to use photosynthesis to convert carbon dioxide and water into organic compounds like carbohydrates. This process is the fundamental source of organic material in the biosphere.

Detailed explanation-3: -The Sun in a food chain is the main source of energy. It is required in almost every food chain. Food chains include specific levels of organisms where energy can be transferred. Most food chains must begin with the Sun.

Detailed explanation-4: -The source of all energy in a food chain is the sun. The energy flows from the sun to the producers to the consumers to the decomposers.

Detailed explanation-5: -Carbohydrates are the main energy source of the human diet. The metabolic disposal of dietary carbohydrates is direct oxidation in various tissues, glycogen synthesis (in liver and muscles), and hepatic de novo lipogenesis.