ECOLOGICAL SUCCESSION

What is primary succession?

• The process by which organisms colonize a barren environment

• The process of soil erosion

• The growth of plants in a forest

• The migration of animals

Which of the following events can lead to primary succession?

• Forest fire

• Glaciers moving

• Flooding

• Earthquake

What do pioneer species do in primary succession?

• They create new water sources

• They break down rock to form dirt

• They provide shade for other plants

• They consume other plants

Tags

NGSS.MS-LS2-2

What must happen to bare rock for primary succession to begin?

• It must be covered with water

• It must be broken down to become dirt

• It must be heated by the sun

• It must be frozen

What forms after the intermediate species in primary succession?

• A desert ecosystem

• A climax community

• A barren environment

• A volcanic eruption

Which of the following is NOT a part of primary succession?

• Formation of dirt from rock

• Growth of shade-tolerant trees

• Immediate growth of large trees

• Arrival of pioneer species

Which of the following is a characteristic of a climax community?

• Constant change and instability

• Stable and self-sustaining

• Lack of animal life

• Absence of plant life

What happens to small plants in the new dirt during primary succession?

• They are outcompeted by larger plants

• They become the dominant species

• They stop growing

• They turn into trees

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4

Which of the following is NOT a pioneer species?

• Bacteria

• Lichens

• Large trees

• Moss

What type of species regrows first in secondary succession?

• Climax species

• Intermediate species

• Pioneer species

• Animal species