Dependence on & Competition

Non-Living things that affect the ecosystem

• biotic

• abiotic

• dead

• zombies

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Living things that affect the ecosystem.

• rocks

• pokemon

• abiotic

• biotic

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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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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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A consumer

• can use chemosynthesis to chemically convert hydrogen sulfide, CO2, and O2 into sugar.

• can use photosynthesis to turn sunlight, water, and CO2 into sugar.

• needs to get its energy from eating or consuming another organism,

• can make its own food.

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Which of the organisms in the diagram are producers?

• Hawks

• Rabbits

• Snakes

• Grass

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If a disease strikes the snake population in the food chain shown, what will be the initial effect on the populations of hawks and rabbits?

• The populations of hawks and rabbits will decrease.

• The populations of hawks and rabbits will increase.

• The population of hawks will increase. The population of rabbits will decrease.

• The population of hawks will decrease. The population of rabbits will increase.

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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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Hawks and brown bears live together in the same ecosystem. 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 are producers

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