A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another. Let's look at the parts of a typical food chain, starting from the bottom—the …

A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another. Let's look at the parts of a typical food chain, starting from the bottom (the …

Learn about the roles of organisms as producers and consumers and how they relate to one another in food chains and food webs.

Not surprisingly, ecologists also have terms that describe where in the food chain a particular consumer operates. A primary consumer eats producers (e.g., a caterpillar eating a leaf); a secondary …

We’ll take a closer look at the movement of energy and matter when we consider food webs, networks of organisms that feed on one another, and biogeochemical cycles, the pathways taken by chemical …

Which of the following organisms is correctly paired with its role in the food chain?

Energy enters an ecosystem through producers, which make their own organic food molecules (carbohydrates) from inorganic sources. Energy and matter move up the trophic levels of an …

Biological carbon cycle Carbon enters all food webs—both terrestrial and aquatic—through autotrophs. Photoautotrophs remove carbon dioxide from the atmosphere and convert it into organic molecules, …

In almost all ecosystems, photosynthesizers are the only "gateway" for energy to flow into food webs (networks of organisms that eat one another). If photosynthesizers were removed, the flow of energy …

In almost all ecosystems, photosynthesizers are the only "gateway" for energy to flow into food webs—networks of organisms that eat one another. If photosynthesizers were removed, the flow of …