Unit 6 Interdependence Review

__________is the process whereby organisms are better adapted to survive and better pass traits along to offspring.

• Evolution

• Natural Selection

• Extinction

• Artifical Selection

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The image above shows a food web, where each letter represents an organism.

Which organism gets energy FROM THE SUN?

• A

• D

• F

• G

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A food pyramid represents the relative amount of energy in trophic levels. Which of the following correctly shows a food pyramid?

• A

• B

• C

• D

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How many organisms consume the rat?

• 1

• 2

• 3

• 4

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____________are the type of organisms which you would find at the top of an energy pyramid.

• autotroph

• decomposer

• consumer

• prey

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What event would occur IMMEDIATELY after and also in some cases during this devastating forest fire to the ecosystem?

• The wildlife populations will decrease

• The wildlife populations will increase

• New species will move into the area

• Plant growth will increase

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Remember back to the lab we did about trees. What abiotic factor were the trees in competition with each other for?

• water

• oxygen

• root space

• sunlight

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When Charles Darwin visited the Galapagos Islands in the 1800s, he observed many types of organisms that were similar but lived on different islands. The four species of mockingbirds found on the Galapagos Islands are shown below. Each species lives on a different island. These species are very similar, but the Hood mockingbird has a longer beak than the other three species. Which of the following best explains this difference?

• the Hood mockingbird needs a longer beak for defense against predators.

• the Hood mockingbird originated from a different type of bird that the other species.

• the Hood mockingbirds longer beak is an adaptation to the food available in the bird's habitat.

• the Hood mockingbird's beak stretched to reach its food, and the longer beak was passed down to its offspring.

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In the picture is evidence that a devastating forest fire swept through the forest. This is an example of Secondary Succession. Look at the picture on the right, what is the name of the organisms to FIRST show up after the devastating fire?

• producers

• consumers

• first level consumers

• pioneer species

The types of small organisms that live on the bottom of streams can be good indicators of water pollution. The table below groups some organisms by their tolerance of pollution. A certain stream that was historically clear and clean has become increasingly polluted with fertilizer waste over the years. Which of these describes a likely result of this pollution?

• Mayflies that were previously abundant are not longer present in the stream

• Stone flies and midges thrive and compete for the same food source.

• Large numbers of crayfish have suddenly died.

• Riffle beetles have become more abundant in the stream.

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