Unit #4: Ecosystems Test

Which best determines the number of wolves that can live in an area?

• the amount of snow in the area each year
• the number of birds that live in the area
• the number of trees in the area
• the amount of food available in the area

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The white-tailed deer found in North Carolina are herbivores. What will most likely happen to the deer if there is a drought and most of the plant life dies?

• Deer population will not change.
• Deer population will increase due to a lack of food.
• Deer population will decrease due to a lack of food.
• Deer population will become carnivores.

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In an ecosystem dependent on pine trees, if a pine forest is cleared for a new housing development, which will most likely occur?

• Some of the organisms would be able to survive the change because of erosion.
• The organisms in the ecosystem would have to adapt to living in fenced area.
• Many of the organisms would perish due to habitat loss.
• All of the organisms would evolve and adapt.

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Which would a drought (not raining for long period) most likely affect?

• all organisms in a particular ecosystem

• only the plants in a particular ecosytem

• only the animals in a particular ecosystem

• it would not affect the organisms

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What term describes a species role in an ecosystem?

• niche

• habitat

• environment

• biome

Which are major abiotic factors that determine the types of plants that can grow in an ecosystem?

• birds and bees
• precipitation and bees
• precipitation and temperature
• temperature and birds

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

• space
• habitat
• shelter
• population

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Which is the most significant limiting factor in a desert ecosystem?

• nutrients
• predators
• sunlight
• water

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Which of these is an abiotic element of a desert ecosystem?

• sand
• cactus
• lizard
• scorpion

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Which best describes mutualism?

• Ticks live and feed on dogs and other animals’ blood to survive.
• Mushrooms send out long, underground structures which allow them to grow in other areas.
• Ants attack animals that try to feed on the acacia tree, and the ants feed on the nectar of the tree.
• Cattle egrets (birds) feed upon the insects stirred up by the feeding cattle.

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