Organisms Competition

Hawks and owls eat the same type of food and struggle with one another to get their food. What is this an example of?

• Competition

• Biotic factor

• Symbiosis

• Population

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Two or more interacting individuals of the same species located in the same area.

• Population

• Community

• Ecosystem

• The YMCA

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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An increase in which of the following factors is likely to contribute to competition between two members of the same species living in a certain habitat?

• Available food resources

• Population of the species

• Annual snowfall

• Overall size of the habitat

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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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Competition becomes more important as the number of individuals ______ or the availability of resources _________.

• increases, decreases

• increases, increases

• decreases, increases

• decreases, decreases

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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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Two species of fish live in the same pond. Which of the following would increase competition between these two species of fish?

• Habitat temperature increases.

• Population of birds that eat the fish increases.

• Number of food plants the fish eat increases.

• Water level in the pond decreases.

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NGSS.MS-LS2-1

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The specific environment in which all the biotic and abiotic factors in an area interact.

• Ecosystem

• Organism

• Struggle

• Competitive Interaction

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The population of deer in a certain area is monitored over a period of six years. The data is represented in the graph provided. Which of the following is the most likely explanation for the change in population in 2009?

• Wild dogs, which prey on deer, were being hunted more than usual.

• Snowfall in the previous spring was higher than the yearly average.

• Humans introduced grazing animals that feed on the same plants as the deer.

• More insects that pollinate flowering plants move into the ecosystem.

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