AP BIOLOGY

Detailed explanation-1: -Primary consumers make up the second trophic level. They are also called herbivores. They eat primary producers-plants or algae-and nothing else. For example, a grasshopper living in the Everglades is a primary consumer.

Detailed explanation-2: -The organisms that eat the primary producers are called primary consumers. Primary consumers are usually herbivores (plant-eaters), though they may be algae or bacteria eaters. The organisms that eat the primary consumers are called secondary consumers. Secondary consumers are generally meat-eaters (carnivores).

Detailed explanation-3: -The first order consumers or primary consumers are always herbivores since they feed on the producers directly. Autotrophs are organisms that produce food using nutrients from the soil and sunlight and are also called producers.

Detailed explanation-4: -This level is made up of herbivores: bacteria, fungi, actinomycetes, nematodes, mites, snails, slugs, earthworms, millipedes, sowbugs and worms. Note that some types of mites are carnivores.

Detailed explanation-5: -The first and lowest level contains the producers, green plants. The plants or their products are consumed by the second-level organisms-the herbivores, or plant eaters. At the third level, primary carnivores, or meat eaters, eat the herbivores; and at the fourth level, secondary carnivores eat the primary carnivores.