7A Populations, communities and ecosystems

Which of the following will secondary succession occur?

• A volcanic eruption that has created rock from lava

• A small forest fire that partly burned some trees

• a flood that removed all soil from the habitat

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How are predation and parasitism similar?

• Both the prey and host will die because of the interaction

• both organisms in predation or parasitism are harmed

• one organism is harmed and the other is neither helped nor harmed

• Only one organism benefits in each type of interaction

What leads to animals becoming endangered. Select the 3 choice that apply

• low genetic diversity

• high resource availability

• loss of habitat

• lots of biodiversity

• climate change

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Lichen is actually fungi and algae living together benefiting each other, what type of relationship is this?

• mutualism

• commensualism

• predation

• parasitism

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What is the difference between primary succession and secondary succession?

• secondary succession has no soil

• primary succession has soil

• primary succession has no soil

• only primary succession has pioneer species

An ecosystem is healthy if it has __________

• low natural resources

• a lot of biodiversity

• no biodiversity

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What 2 factors make up biodiversity?

• the number of organisms in an area

• natural resources

• the variety of organisms

• low genetic diversity

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When each organism in a habitat has its own niche then there will be ____________-

• a lot of competition

• Food available

• a lack of competition

• less food available

Why are keystone species such as coral or the African elephant so important?

• they protect water resources

• many other species depend on them for survival

• they get rid of invasive species

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A small amount of genetic diversity in a species can lead to _________

• extinction

• animal populations increasing

• more competition

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