SEV2cd & SEV1e Review

What is ecological succession?

• The process by which organisms migrate between ecosystems

• The gradual change in species composition in an ecosystem over time

• The extinction of a species due to natural disasters

• The immediate recovery of an area after a disturbance

Tags

NGSS.MS-LS2-4

Which of the following best describes primary succession?

• Succession that occurs where soil is already present

• Succession in areas previously inhabited by humans

• Succession that begins on bare rock or newly formed land

• The regrowth of a forest after a fire

The first organisms to colonize a barren environment are called:

• Native species

• Keystone species

• Pioneer species

• Climax species

During the pioneer stage of succession, which type of organism is most likely to appear first?

• Large trees

• Lichens and mosses

• Shrubs

• Insects and birds

What occurs during the intermediate stage of succession?

• Only mosses and lichens are present

• A stable climax community forms

• Grasses, shrubs, and small trees begin to grow

• The area remains completely barren

Tags

NGSS.MS-LS2-3

The climax stage of succession refers to:

• The fastest stage of growth in a new ecosystem

• A community that has reached a stable and balanced condition

• A stage with only pioneer organisms

• The end of all biodiversity

Tags

NGSS.MS-LS2-4

Which of the following correctly orders the stages of succession?

• Intermediate → Climax → Pioneer

• Climax → Pioneer → Intermediate

• Pioneer → Intermediate → Climax

• Intermediate → Pioneer → Climax

The time scale of succession can range from:

• A few days to a few weeks

• A few months to a few years

• Decades to thousands of years

• One year only

Secondary succession occurs after:

• Lava forms new rock

• A glacier melts exposing bare rock

• A forest fire leaves soil intact

• Volcanic eruption creates a new island

Tags

NGSS.MS-LS2-4

Which type of succession occurs faster?

• Primary succession

• Secondary succession

• Climax succession

• Pioneer succession