AP BIOLOGY

Detailed explanation-1: -Producers, also known as autotrophs, make their own food. They make up the first level of every food chain. Autotrophs are usually plants or one-celled organisms. Nearly all autotrophs use a process called photosynthesis to create “food” (a nutrient called glucose) from sunlight, carbon dioxide, and water.

Detailed explanation-2: -Every food chain starts with producers because only plants are capable of changing light energy into chemical energy, which is then used by both plants and other consumers.

Detailed explanation-3: -All food chains start with energy from the sun. This energy is captured by plants. Thus the living part of a food chain always starts with plant life and ends with an animal. Plants are called producers because they are able to use light energy from the sun to produce food (sugar) from carbon dioxide and water.

Detailed explanation-4: -Producers, such as plants, are organisms that utilize solar or chemical energy to synthesize starch. All food chains must start with a producer.

Detailed explanation-5: -A food chain starts with photosynthesizing organisms.