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Biology

8th -

12thgrade

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Community Ecology

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18 questions

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  • 1. Multiple Choice
    1 minute
    1 pt
    Primary succession is... 
    When a hurricane causes a river to flood its banks
    When a farmer ploughs his fields to remove all existing plant life.
    When fire burns through a forest and ills all vegetation less than 1m tall.
    When increasing temperature causes a glacier to recede from an area of rocky ground
  • 2. Multiple Choice
    30 seconds
    1 pt
    The secondary succession is 
    lichens and mosses arrive on bare rock and begin to trap soil
    a complex, stable ecosystem is formed
    plants grow in an area devastated by a flood
    plants grow in a newly formed pond
  • 3. Multiple Choice
    30 seconds
    1 pt
    A key stone species is...
    the top carnivore.
    has the largest population.
    has the most specialized niche.
    determines numbers and types of other species.
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