Ecosystems Review - Part 1

The chart shows the human population and the fox population in an area. Which best explains the relationship between the human and fox populations in the ecosystem?

• Humans compete for the same prey as foxes, causing the fox population to drop.

• Humans compete for the same space as foxes, causing the fox population to drop.

• Humans are affected by the same diseases as foxes, causing both populations to change in the same way.

• Humans are affected by the same predators as foxes, causing both populations to change in the same way.

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The graph shows the relationship between available space in an ecosystem and a population of rabbits. How would the rabbit population be affected if land was cleared to build a housing development?

• The rabbit population would increase.

• The rabbit population would decrease.

• The rabbit population would remain stable.

• The rabbit population would rise temporarily, then fall.

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A forest food web includes rodents, snakes, and great horned owls.

Snakes eat rats.

Great horned owls eat mice and snakes.

How will the owls most likely be affected by a sudden sharp increase in local populations of rodents?

• The owl population will either stabilize or increase.

• The owl population will migrate to another area.

• The owls will have to find another food source or risk starvation.

• Owls will have to compete with each other for available food.

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The diagram shows the food web of a forest ecosystem.

Which would be negatively affected by an increase in the beetle population?

• Frog

• Grass

• Robin

• Snake

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The diagram shows the feeding relationships between six organisms.

Which organism would most likely compete for food resources?

• R and S

• S and T

• T and W

• V and W

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Which would a drought most likely affect?

• all organisms in a particular ecosystem

• only the plants in a particular ecosystem

• only the animals in a particular ecosystem

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What best describes the reaction of a new population to an increase in the amount of space it occupies?

• The population will die out.

• The population will remain constant.

• The population will grow exponentially.

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Which would happen to fish in a pond where the population of algae increases?

• A decrease in oxygen causes many fish to die.

• An increase in nutrients allows for healthier fish.

• A decrease in nutrients causes fish to become malnourished.

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What term describes how a species meets its need for food and shelter and how it reproduces?

• niche

• habitat

• environment

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Which is the place where a member of a population lives and finds food?

• space

• habitat

• shelter

• population