Each food chain is a descriptive diagram including a series of arrows, each pointing from one species to another, representing the flow of food energy from one feeding group of organisms to another.

Its bar goes at the bottom of the pyramid. Energy is lost to the ... including humans. The diagram shows how mercury can accumulate in the food chain. In the sea, tiny animals and plants called ...

The USDA has simplified nutrition guidelines with its "MyPlate" campaign. MyPlate replaces the older Food Pyramid. Considering that salt is an ingredient in just about every type of processed food ...

However, whereas humans search for substances like fossil fuels to power their homes and businesses, cells seek their energy in the form of food molecules or sunlight. In fact, the Sun is the ...