https://padlet.com/william_hawkins1/ordha6x1x0ac en-us 2018-02-12 13:24:33 UTC 2018-02-12 14:00:16 UTC hello@padlet.com william_hawkins1 https://padlet.com/william_hawkins1/ordha6x1x0ac/wish/230574634  1. Which of the following descriptions about the organization of an ecosystem is correct? a. Communities make up species, which make up populations. b. Populations make up species, which make up communities. c. Species make up communities, which make up populations. d. Species make up populations, which make up communities. 
 
2. The lowest level of environmental complexity that includes living and nonliving factors is the a. biome. c. ecosystem. b. community. d. biosphere. 

 3. Which of the following is NOT a basic method used by ecologists to study the living world? a. experimenting c. modeling b. animal training d. observing 


 4. Plants are a. primary producers. c. herbivores. b. primary consumers. d. omnivores.

 5. Compared to land, the open oceans a. have less zooplankton. c. are nutrient-poor environments. b. contain unlimited nitrogen. d. are rich in silica and iron

 6. All the interconnected feeding relationships in an ecosystem make up a food a. interaction. c. network. b. chain. d. web.  

7. The total amount of living tissue within a given trophic level is called the a. organic mass. c. energy mass. b. trophic mass. d. biomass. 

 8. A word that means the same thing as consumer is a. producer. c. heterotroph. b. autotroph. d. carbohydrate.

  9. Matter can recycle through the biosphere because a. matter does not change into new compounds. b. matter is assembled into chemical compounds. c. biological systems do not use up matter, they transform it. d. biological systems use only carbon, oxygen, hydrogen, and nitrogen.

 10. What is happening to water at D in Figure 3–1? a. Water is falling to the ground as precipitation. b. Water is evaporating from the ocean. c. Water is being taken up by plants through transpiration. d. Water is seeping into the ground to become groundwater.

11. Nitrogen fixation is carried out primarily by a. humans. c. bacteria. b. plants. d. consumers.

12. The movements of energy and nutrients through living systems are different because a. energy flows in one direction, and nutrients recycle. b. energy is limited in the biosphere, and nutrients are always available. c. nutrients flow in two directions, and energy recycles. d. energy forms chemical compounds, and nutrients are lost 

13. Animals that get energy by eating the carcasses of other animals that have been killed by predators or have died of natural causes are called a. scavengers. c. heterotrophs. b. omnivores. d. detritivores. 

14. Each of the following is an abiotic factor in the environment EXCEPT a. plant life. c. rainfall. b. soil type. d. temperature. 

15. The branch of biology dealing with interactions among organisms and between organisms and their environment is called a. economy. c. recycling. b. modeling. d. ecology 

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