Ecosystems

In a meadow ecosystem, a population of rabbits increases. What populations are most likely to increase as a result?

• foxes, haws, and other predators of rabbits

• rabbits that live elsewhere

• leafy plants that rabbits eat

• worms that live in the meadow soil

Without decomposers, what would build up on the ground and not return to the soil?

• large rocks

• rain water

• bacteria and other microorganisms

• dead plant and animal matter

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In any community, which group includes the largest number of animals?

• herbivores

• prey

• predators

• consumers

All the living and nonliving things in an area make up a/an

• community.

• ecosystem.

• population.

• environment.

An organism that makes its own food is a/an

• producer.

• consumer.

• predator.

• prey.

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Two or more overlapping food chains form a/an

• food chain

• food web

• community

• population

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To avoid being eaten, a rabbit will run away from

• carnivores.

• scavengers.

• herbivores.

• producers.

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Without the Sun, which of Earth's organisms could no longer survive?

• producers only

• producers and consumers

• scavengers only

• nearly all organisms

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What is the best choice for studying decomposers at work?

• a rotting log on the forest floor

• a live, healthy tree

• a robin that builds a nest in a tree

• cut wood at a lumber yard

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How many organisms make up a typical food chain?

• 1 or 2

• 3 to 6

• 10 to 50

• more than 50

Tags

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