Unit 4 Ecosystems: Stability and Change

In an ecosystem where resources are becoming less available, what effect will it have on population growth?

• Only becomes negative

• Increases slowly

• Exponential growth

• Reaches carrying capacity

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

Several species of herbivores can only live in the same habitat because of which of the following?

• have different habitats

• only eat different foods

• occupy different niches within the habitat

• need different abiotic factors

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NGSS.MS-LS2-2

The symbiotic relationship between the crocodile and native birds is which of the following:

• mutualism: bird gets food and crocodile gets fewer parasites/risk of infection

• commensalism: the bird gets food but crocodile does not benefit

• parasitism: the bird gets food but harms the crocodile

• predation: the crocodile eats the bird

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NGSS.MS-LS2-2

Which letter on the graph represents exponential growth of the population?

• A

• B

• C

• D

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NGSS.HS-LS2-2

Using the survivorship curve graph, what species has the highest number of offspring that survive to old age?

• Type I: Humans

• Type II: Songbirds

• Type III: Frog

• None of the Above

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NGSS.HS-LS2-2

Using the image provided, which diagram represents a habitat that would be most affected by a density dependent limiting factor?

• A

• B

• C

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

Using the image provided, which diagram represents a clumped population such as schools of fish?

• A

• B

• C

A cattle farm goes out of business. The fields once used for crops become weedy meadows, then shrubby areas, and finally a forest. This represents an example of which of the following?

• Trophic Cascade

• Primary Succession

• Secondary Succession

• Competitve Exclusion Principle

How can we limit the effect of deforestation on ecosystems?

• Use more wood products

• Increase carbon dioxide levels

• Plant and harvest trees from tree farms

• Fertilize the soil

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NGSS.MS-ESS3-3

NGSS.MS-LS2-5

All of the following are threats to biodiversity except which one?

• Habitat Fragmentation

• Pollution

• Climate Change

• Species Preservation

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NGSS.MS-LS2-5