Community Interactions

What causes competition to occur in an environment?

• Good conditions make resources plentiful.

• Organisms struggle for a limited resource.

• Members of a population have different roles.

• A population falls below the environment’s carrying capacity.

Without other changes to a population, which of the following will cause a population to increase in size?

• The birth rate equals the death rate.

• The birth rate is less than the death rate.

• The birth rate is greater than the death rate.

• The birth rate and the death rate both equal 0.

One factor that drives population changes is

• the availability of resources.

• predation

• both a and b.

• none of the above.

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When a population grows past the ecosystem's carrying capacity, what happens to the population?

• Continues to grow

• The population starts to die off to return to carrying capcity

• The population will go extinct due to lack of resources

• The population grows then finds a new carrying capacity

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NGSS.MS-LS2-1

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Bees pollinate flowers, helping flowers reproduce. In turn, bees collect nectar for energy. This is an example of

• Competition

• Predation

• Symbiosis

• Parasitism

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Can there be competition between plants?

• no, plants cannot move to compete with other plants

• no, plants get all the resources they need so they don't need to compete

• yes, plants battle other plants and steal resources from losers

• yes, some plants take more resources from the ecosystem

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NGSS.MS-LS2-1

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Which describes this picture

• the bobcat is the parasite, the rabbit is the host

• the bobcat is the prey, the rabbit is the predator

• the bobcat is the host, the rabbit is the parasite

• the bobcat is the predator, the rabbit is the prey

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NGSS.MS-LS2-2

Competition occurs when organisms attempt to use the same resources

• True

• False

When two populations compete for the same resource, what usually happens?

• Both populations grow

• Both populations shrink

• One population grows, while the other shrinks

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NGSS.MS-LS2-1

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What is an invasive species?

• A native (naturally found) species which are added to an area.

• A non-native (not naturally found) species added to an area.

• A keystone species in an environment

• none of the above

Tags

NGSS.MS-LS2-2