Ecology

The organisms represented by X are

• Decomposes

• Producers

• Carnivores

• Scavengers

Which statement concerning an ecosystem is correct?

• It can exist with or without a constant source of energy input.

• It must contain consumers but can exist without producers.

• It involves interactions between biotic and abiotic factors

• It can exist on land, but it cannot exist in lakes, rivers, or oceans.

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NGSS.MS-LS2-3

Energy for this ecosystem originally comes from

• water

• consumers

• sunlight

• plants

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

An environment can support only as many organisms as the available energy, minerals, and oxygen will allow. Which term is best described by this statement?

• biological feedback

• carrying capacity

• homeostatic control

• biological diversity

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which statement best explains why the population stabilized?

• Interbreeding between members of the population increased the mutation rate.

• The population size became limited due to factors such as availability of food.

• An increase in the chipmunk population caused an increase in the producer population.

• A predator species came to the area and occupied the same niche as the chipmunks

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which organisms are not shown in this diagram but are essential to a balanced ecosystem?

• heterotrophs

• autotrophs

• producers

• decomposers

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NGSS.MS-LS2-3

NGSS.MS-LS2-4

The greatest amount of available energy is transferred from level

• A to level B

• A to level C

• B to level A

• D to level A

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NGSS.MS-PS3-5

If the population of mice is reduced by disease, which change will most likely occur in the food web?

• The cricket population will increase.

• The snake population will increase.

• The grasses will decrease.

• The deer population will decrease.

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NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Why has Earth's human carrying capacity increased greatly?

• Other organisms have been displaced by agriculture, so there is more space for humans.

• Humans have modified their environment due to technological advances.

• Humans can live closer together than other animals

• Humans are now eating fewer plants than they used to.

A consumer that eats plants is known as a

• heterotroph

• herbivore

• producer

• community