The diagram shows an ocean food chain. Which organism in the food chain above is a producer?
Phytoplankton
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15
What would happen if you removed one of the nonliving elements from an ecosystem?
The living organisms in the ecosystem would not survive.
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What is a biotic factor?
living or once living organisms
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The diagram shows a prairie food web.Many garter snakes have moved out of the ecosystem due to colder temperatures. Which statement best predicts what will happen in the ecosystem?
The toad population in the ecosystem will increase.
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15
The diagram provided shows the food web for a coastal ecosystem.The Sheepshead minnow population in this ecosystem has decreased due to disease. Which statement best explains why blue crab population decreases?
The blue crab have lost one of their food sources.
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5
Which organisms receives its energy by breaking down dead organisms?
decomposers
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25
The diagram shows an ocean food web.Commercial fishing has reduced the number of shrimp in the ecosystem. Which of the following is the most reasonable prediction of a result?
The tuna population will decrease.
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monster
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seesaw
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rocket
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thief
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15
What is an abiotic factor?
nonliving things
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25
Why do plants need light and soil?
Plants need light for photosynthesis and soil to anchor their roots and to absorb water and nutrients.
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25
What are terrestrial organisms?
organisms that live on land
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monster
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gift
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fairy
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thief
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Aphids are insects that destroy crops and other plants. Ladybugs are natural predators of aphids. What would happen if the ladybugs in your garden caught a deadly bacteria?
If the ladybugs died, the number of aphids would increase. This increase would mean that more plants in my garden would be attacked by the aphids.
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15
Explain what happens to the native plants and animals when an invasive species is introduced.
It disrupts an ecosystem.
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15
Name three examples of biotic factors in an ecosystem?
