Living in the Environment 18th Edition by Tyler Miller,Scott Spoolman

تمرين 12

What is a trophic level Distinguish among producers (autotrophs) , consumers (heterotrophs) , decomposers , and detritus feeders (detritivores) , and give an example of each in an ecosystem. Describe the processes of photosynthesis. Distinguish among primary consumers (herbivores) , carnivores , secondary consumers , tertiary consumers , and omnivores , and give an example of each. Explain why there is little waste in nature and why humans are a major exception to this natural process.