Chapter 21 Resource: Ecology

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Name Date Class2ReinforcementRelationships Among Living ThingsMeeting Individual NeedsDirections: Determine whether the italicized term makes each statement true or false. If the statement is true,write true in the line provided. If the statement is false, write the term that makes the statement true.1. Ecologists find it helpful to organize living things by howthey interact with each other and their environments.2. A biosphere is a group of the same type of organisms livingin the same place at the same time.3. Algae, sharks, and coral are all examples of communities.4. There are 100 trees growing on a lot that is 10 square kmin size. The population density is 100 trees per square km.5. The amount of rainfall an ecosystem receives is a limitingfactor.6. A predator captures and eats other animals.7. The role of an organism in an ecosystem is called theorganism’s habitat.Directions: Answer the following questions on the lines provided. Use complete sentences.8. What is the relationship between a population and a community?9. How do members of a community interact with each other?10. What are two examples of limiting factors.11. How might a falcon (predator) and a field mouse (prey) interact in a community?12. In what type of habitat might you find birch trees, mushrooms, and deer?Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.24 <strong>Ecology</strong>
Name Date Class3ReinforcementEnergy Through the EcosystemDirections: Use the following diagram of the food web to answer the questions below.Immature herringArrow wormsAdult herringJellyfishBarnacle larvaeWater fleasCopepodsMollusk larvaePhotosynthetic algae BacteriaSand eelsMeeting Individual Needs1. Which are the producers in this food web? Which are the decomposers?Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.2. List three consumers of barnacle larvae in this food web.3. Provide the missing consumer in the food chain: algae → mollusk larvae →jellyfish →___?___→ adult herring4. What “energy relationship” exists between the immature herring, arrow worms,and adult herring?5. How might the energy of this ecosystem get passed on to an organism on land?<strong>Ecology</strong> 25
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Chapter 21 Resource: Ecology

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