AP Environmental Unit 2

What is primary succession?

• The process of ecological change in an area with existing soil.

• The process of ecological change that occurs in an area where no soil exists, such as after a volcanic eruption.

• The gradual replacement of one community by another in a stable environment.

• The immediate response of an ecosystem to a natural disaster.

What is the role of keystone species in an ecosystem?

• Keystone species have a minor impact on their environment and do not affect ecosystem structure.

• Keystone species are the most abundant species in an ecosystem.

• Keystone species have a disproportionately large impact on their environment relative to their abundance, helping to maintain the structure of the ecosystem.

• Keystone species are only important during certain seasons of the year.

Tags

NGSS.MS-LS2-4

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According to island biogeography, how does species richness change with proximity to the mainland and island size?

• Species richness decreases as islands are closer to the mainland and decreases as islands increase in size.

• Species richness increases as islands are farther from the mainland and decreases as islands increase in size.

• Species richness increases as islands are closer to the mainland and increases as islands increase in size.

• Species richness remains constant regardless of the distance to the mainland or the size of the island.

How do invasive species affect native ecosystems?

• Invasive species can enhance biodiversity by introducing new species.

• Invasive species can outcompete native species for resources, disrupt food webs, and lead to declines in biodiversity.

• Invasive species have no significant impact on native ecosystems.

• Invasive species only affect the physical environment, not the biological aspects.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

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What characterizes endangered species?

• Endangered species have rapidly declining populations.

• Endangered species are found in every habitat.

• Endangered species are always large animals.

• Endangered species have stable populations.

What role do lichens play in primary succession?

• Lichens begin to break down rock to form soil.

• Lichens provide food for herbivores.

• Lichens absorb water from the atmosphere.

• Lichens produce oxygen through photosynthesis.

Tags

NGSS.MS-LS2-3

What is a climax community?

• A temporary ecological community that is in the process of change.

• A stable and mature ecological community that has reached a steady state.

• A community that is dominated by invasive species.

• A community that is always changing and never stable.

Tags

NGSS.MS-LS2-4

What is the term for the predictable replacement of one group of species by another over time?

• Evolution

• Succession

• Adaptation

• Migration

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NGSS.MS-LS4-1

What is secondary succession?

• The process of ecological change in an area with no soil.

• The process of ecological change that occurs in an area where soil exists but has been disturbed, such as after a forest fire.

• The initial colonization of barren land by organisms.

• The gradual replacement of one community by another in a stable environment.

What type of succession occurs after a forest fire?

• Primary succession

• Tertiary succession

• Secondary succession

• Climatic succession