Texas Biology EOC RC 4: Ecology & Interdependence

Which ecological relationship involves one organism benefiting while the other is neither helped nor harmed?

• Predation

• Mutualism

• Parasitism

• Commensalism

What percentage of energy is typically transferred from one trophic level to the next?

• 50%

• 5%

• 10%

• 20%

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NGSS.MS-LS2-3

Which process is NOT part of the carbon cycle?

• Nitrification

• Combustion

• Photosynthesis

• Respiration

What is a major effect of altering the nitrogen cycle?

• Increased greenhouse gases

• Waterway contamination

• Species extinction

• Higher predation rates

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NGSS.MS-LS2-4

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Which factor generally increases ecosystem stability?

• Reduced species diversity

• Increased pollution

• Higher biodiversity

• Lower resilience

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NGSS.MS-LS2-5

What is the role of keystone species in an ecosystem?

• They are always top predators

• Their loss can have domino effects on ecosystem structure

• They reduce biodiversity

• They have a minor impact on ecosystem structure

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NGSS.MS-LS2-4

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Which human activity is NOT mentioned as affecting biodiversity?

• Pollution

• Space exploration

• Habitat destruction

• Climate change

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NGSS.MS-LS2-4

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What is the definition of ecosystem stability?

• The ability to reduce energy flow

• The ability to increase species diversity

• The ability to maintain structure and function in the face of disturbances

• The ability to eliminate all predators

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NGSS.MS-LS2-4

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Which ecological relationship can lead to competitive exclusion or resource partitioning?

• Mutualism

• Parasitism

• Commensalism

• Competition

Which of the following would indicate the greatest problem with the health of an ecosystem?

• There has recently been a change in the ecosystem’s weather.

• The ecosystem includes only a few kinds of plants and animals.

• The average temperature in the ecosystem has increased slightly over many years.

• The population of top predators increases and decreases in a regular pattern.

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