ecology unit 2_jv

1. The branch of biology dealing with interactions among organisms and between organisms and their environment is called

• a. economy.

• b. modeling.

• c. recycling.

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• d. ecology.

2. 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.

4. In what way are herbivores and carnivores alike?

• a. They both use photosynthesis to make their own food.

• b. They both obtain energy by consuming other organisms.

• c. They both directly consume producers.

• d. They both are considered to be autotrophs

5. The total amount of living tissue within a given trophic level is called the

• a. organic mass.

• b. trophic mass.

• c. energy mass.

• d. biomass.

6. What animals eat both producers and consumers?

• a. herbivores

• b. omnivores

• c. chemotrophs

• d. autotrophs

8. 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.

9. The repeated movement of water between Earth’s surface and the atmosphere is called

• a. the water cycle.

• .

  b. the condensation cycle.

• c. precipitation.

• d. evaporation.

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 one direction, and energy recycles.

• d. energy forms chemical compounds, and nutrients are lost as heat.

14. If a lake receives a large input of a limiting nutrient, which of these would happen first?

• a. An algal bloom occurs.

• b. Algae begin to die and decomposers take over.

• .

  c. Nitrogen compounds are recycled.

• d. The concentration of oxygen drops below the necessary level.

15. Each of the following is an abiotic factor in the environment EXCEPT

• a. plant life.

• b. soil type.

• c. rainfall.

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• d. temperature.