Investigating How Organisms and Populations Depend on Biotic and Abiotic Factors

Not living, or produced by living things

• Abiotic factors

• Biotic factors

• Ecosystem

• Population

Living, or produced by living things

• Biotic factor

• Abiotic factor

• Organisms

• Competition

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

• Ecosystem

• Organism

• Struggle

• Competitive Interaction

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A self-contained living thing.

• Organism

• Population

• Abiotic factor

• Ecosystem

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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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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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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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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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