Ms Standardized Test Preparation

DIRECTIONS: Choose the letter of the answer choice that best answers the question.

1. What are the levels of organization in ecology?

A. cell, tissue, organ, organ system, body

B. organ, organism, population, community

C. organism, population, community, ecosystem, biosphere

D. population, habitat, ecosystem, biogeochem-ical system, planet

2. What makes up an ecosystem?

F. all the habitat types on Earth

G. all parts of Earth where life exists

H. all members of a species in the same area J. all the living and nonliving factors in an environment

3. Which of the following are abiotic factors?

A. plants

B. animals

C. sunlight

D. microorganisms

4. How do decomposers benefit an ecosystem?

F. by returning nutrients to the soil

G. by manufacturing energy from sunlight

H. by removing excess nutrients from the soil J. by removing predators from the ecosystem

5. Which organisms are most critical in the nitrogen cycle?

A. plants

B. nitrates

C. animals

D. bacteria

INTERPRETING GRAPHICS: The illustration below represents a trophic pyramid. Use the illustration to answer the question that follows.

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