Name ______Date ______Per ______

ECOLOGY WORKSHEET

I. Vocabulary Matching – Match each term with the correct definition. Each choice is used one time.

______1. Role in an ecosystem carried out by Eubacteria & Fungi

______2. Term used to describe any organism that must obtain itsfood

______3. A community and its abiotic components

______4. Required by all organisms to make their proteins and nucleic acids

______5. Animals at the third trophic level that eat other animals

______6. Evaporation of water through a plant’s leaves

______7. Step in the pathway of energy & matter through an ecosystem

______8. Autotrophs

______9. Many different species that live together in a habitat

_____10. Linear pathway of energy transfer through the trophic levels of an ecosystem

_____11. Animals at the second trophic level that eat plants

_____12. Complex, interconnected pathway of energy transfer in an ecosystem

_____13. Group of organisms in one area that are members of the same species

_____14. Study of the interaction of organisms with each other & their environment

_____15. Animals that eat both plants and animals

_____16. Place where a particular population lives

_____17. Mineral required for making nucleic acids such as DNA, RNA, ATP

_____18. Ability of some bacteria to convert nitrogen into a useable form

_____19. Group of similar ecosystems with similar climate and weather patterns

_____20. Earth

_____21. Process by which bacteria to use inorganic compounds in the soil to produce their own food

II. Multiple Choice

_____22. The crab Lybia tessellata carries a pair of sea anemones on its claws. Thecrab uses the sea anemone’s stinging

tentacles as protection and the seaanemone obtains small food particlesreleased by the crab as it feeds.

Which type of symbiotic relationshipdoes this best illustrate?

A. commensalismC. parasitism

B. mutualismD. predation

This diagram shows the flow of carbon in a terrestrial ecosystem.

_____23. Which will most likely happen if the decomposers are removed from the carbon cycle?

  1. The amount of carbon dioxide in the atmosphere will increase.
  2. The amount of carbon dioxide in the atmosphere will decrease.
  3. The amount of carbon dioxide used by producers will increase.
  4. The amount of carbon dioxide needed by consumers will decrease.

_____24. A student is performing an investigation of theeffects of fire on pine seedlings in a forest. The student

conducts a study of ten plots thatare burned annually. What is an appropriatecontrol for this experiment?

  1. ten plowed plots
  2. ten cleared plots
  3. ten unburned plots
  4. ten herbicide-treated plots

_____25. Look at the food web on the right. Suppose the bird population

declines due toa shortage of nesting sites. Which organismwould

be most negatively affected by adecline in the bird population?

  1. spider
  2. snake
  3. grass
  4. toad

_____26. A scientific experiment is conducted todetermine the

effects of different levels ofcaffeine on exercise

performance. In thisexperiment, what are the levels of caffeine?

  1. the control
  2. the summary statistic
  3. the dependent variable
  4. the independent variable

_____27. Look at the diagram to the right. Which organism has the greatest biomass?

  1. krill
  2. baleen whale
  3. phytoplankton
  4. both krill and the baleen whale

_____28. A scientist is examining what happens torodents

and grasses when more hawks areallowed to hunt

rodents in a field. What levelof ecology is he observing?

  1. an organism
  2. a population
  3. a community
  4. an ecosystem

_____29. A hypothesis and a theory are related because

  1. a theory is always used to develop ahypothesis.
  2. they are both developed in the absenceof observations.
  3. the data collected when a hypothesis istested can support a theory.
  4. an experiment is done before theformation of both a hypothesis and atheory.

_____30. Which is the most likely order of plant lifesuccession around a volcano that erupted anddestroyed most life

forms?

A. lichensgrassesshrubstrees

B. shrubsgrassestreeslichens

C. mossesgrasseslichenstrees

D. grassestreesmosseslichens