Consumption by tertiary consumer A 20-kilogram river otter (a tertiary consumer) requires the energy harnessed by about kg of primary producers. Assume that 90% of the energy at each trophic level is lost as heat.

Use the drop-down menu to match the following definitions to the corresponding terms. the total variety of organisms that live in the biosphere a group of organisms that breed and produce offspring that can breed all of the biotic and abiotic factors in an area

Aristotle classified animals according to their a. habitat and mating behavior c. mating behavior and relatedness b. habitat and physical differences d. physical differences and mating behavior

Why do you suppose the structural polysaccharide cellulose does not contain branches?