EVERYDAY SCIENCE

Detailed explanation-1: -Phytoplankton are the foundation of the aquatic food web, the primary producers, feeding everything from microscopic, animal-like zooplankton to multi-ton whales. Small fish and invertebrates also graze on the plant-like organisms, and then those smaller animals are eaten by bigger ones.

Detailed explanation-2: -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.

Detailed explanation-3: -Most algae possess chlorophyll a. As primary producers, they use the sunlight energy to convert inorganic substances into simple organic compounds, and, provide the principal basis of food webs on the Earth.

Detailed explanation-4: -The primary producers include green plants, lichens, moss, bacteria, and algae.