STAAR Review Week 4 Quiz-Organisms and the environment

Which of these describes one or more living organism that depends on another living organism to survive?

• Ivy plants growing up a fence to obtain more sunlight

• Bacteria living in the mouth of a horse

• A lizard sunning on a rock

• A goldfish releasing carbon dioxide in the lake water

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Aquatic plants have adaptations that help them live in water. For example, the structures needed for making food are located on the tops of floating plant leaves. This adaptation helps the plants -

• stay anchored

• absorb sunlight

• avoid predators

• capture fish

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Which of the following is an example of an abiotic factor?

• rose bush

• water

• grass

• rabbit

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A drought has hit this grassland biome. How will this effect the rabbit population?

• The rabbits will increase in number.
• The rabbit population will stay the same.
• The rabbit population will decrease.
• The rabbit population will become extinct immediately.

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Which option is biotic?

• Plants

• Air

• Water

• Energy

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In this tundra food web, if all grasses died out from disease, what is a possible outcome for this ecosystem?

• There would be an overpopulation of arctic hares and lemmings.

• Polar bears would move to a new ecosystem

• The ecosystem would collapse because it lost its main producer

• Wildflowers would die out from the ecosystem

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A student observes the following activities while walking in the park. Which of these living organisms (Biotic factors) was interacting with another living organism in the environment?

• fire ant

• blue jay

• bee

• hawk

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In this freshwater ecosystem food web, which organisms transfer the MOST energy within the food web?

• Bass, because they are predators in this web

• Copepods, because they support two chains in this web

• Crayfish, because they are at the bottom of this web

• Algae, because they are the producers in this web

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Prairie dogs eat plants and dig underground tunnels. Prairie dogs tunnels help break up hard soils, and the animals' waste adds nutrients to the soil. In the past, large groups of prairie dogs lived in many parts of the U.S. Great Plains, but people have destroyed most of these prairie dog colonies. Which of these will most likely happen when prairie dogs are removed from an area?

• The population of predators that eat prairie dogs will decrease.

• The population of plants that prairie dogs eat will decrease.

• The nutrients in the soil will increase.

• The number of underground tunnels will increase.

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Biodiversity refers to

• extinct species
• the variety of species on Earth
• nonrenewable resources
• the rate of species decline

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