4 Written Questions

1. shaped that way to show that biomass is largest at the base, and decreasing in amount as it goes through the apex. The two types of biomass pyramids are the upright and the inverted. The upright pyramid is found in most ecosystems. It results when the combined weight of producers is larger than the combined weight of consumers. An inverted type results when the combined weight of producers is smaller than the combined weight of consumers.
2. an herbivore; an organism that eats plants or other autotrophs
3. a carnivore that eats herbivores
4. a consumer that derives its energy and nutrients from nonliving organic material such as corpses, fallen plant material, and the wastes of living organisms; a decomposer

3 Multiple Choice Questions

1. an autotroph, usually a photosynthetic organism. Collectively, autotrophs make up the trophic level of an ecosystem that ultimately supports all other levels
   1. tertiary consumer
   2. primary producers
   3. primary consumer
   4. secondary consumer
2. the different feeding relationships in an ecosystem, which determine the route of energy flow and the pattern of chemical cycling
   1. primary producers
   2. primary consumer
   3. trophic structure
   4. detritivore
3. a carnivore that eats other carnivores
   1. primary consumer
   2. secondary consumer
   3. primary producers
   4. tertiary consumer

3 True/False Questions

1. food web → all the organisms in a given area as well as the abiotic factors with which they interact; one or more communities and the physical environment around them

   True        False

2. biomass → the interconnected feeding relationships in an ecosystem

   True        False

3. ecosystem → the interconnected feeding relationships in an ecosystem

   True        False