Competition and Organism Interactions in Ecosystems

Competition in an ecosystem occurs when

• animals get bored.

• more than one individual or population in an ecosystem relies (needs) the same limited resource.

• there is more than enough of a resources for every living organism.

• resources are unlimited.

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Hawks and brown bears live together in the same habitat. There will be competition between the hawks and the brown bears only if which of the following is true?

• Brown bears hibernate during the winter while hawks remain active.

• Pesticides in the fish population affect hawks’ eggs and decrease their population.

• Both brown bears and hawks feed on the same species of fish.

• Both Shanna and Savanna feed on the same species of snakes.

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In an ecosystem, what do organisms and populations with similar needs compete over?

• food

• water

• shelter

• all of the above

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When an organism depends on a factor for survival, this is called a ______________________ interaction.

• independent

• questionable

• dependent

• expendable

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Competition: When organisms attempt to use the same ​ (a)   ecological resources in the same place at the same time.

​ (b)   : between members of the same species

​ (c)   : between members of different species

• limited

• Intraspecific

• Interspecific

• unlimited

Many organisms in an ecosystem compete for which of the following? (Select all that apply.)

• Food/Water

• Shelter

• Mate

• Friends

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A student wants to investigate competition between two organisms. For the investigation, it is most important that the student should choose organisms that –

• reproduce at a faster rate.

• are both active during the night.

• have the different adaptations.

• require the same resources.

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NGSS.MS-LS2-1

A system made up of all the biotic and abiotic factors in an area and all the interactions among them.

• Ecosystem

• Niche

• Adaptation

• Nutrasystem

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A limited resource in an ecosystem is

• something that is appreciated by organisms and is not infinite (unlimited) in the environment. If the resource runs out or is destroyed, the organisms will be okay.

• something that is unlimited and will last forever, organisms and populations may compete, but only for fame and glory.

• something that is needed by organisms and is not infinite (unlimited) in the environment. If the resource runs out or is destroyed, then the organisms that need it will likely die off.

• something that is not needed by organisms and is not infinite (unlimited) in the environment. If the resource runs out or is destroyed, then there will be no effect on the organisms.

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Plants compete for air, water, ________ within ecosystems.

• space, and sound

• sunlight, and wind

• space, and sunlight

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