What is coevolution?

• The study of prehistoric life.

• The study of the structures of organisms.

• When two or more species affect each other's evolution through the process of natural selection.

• Over generations, organisms evolve a variety of characteristics that allow them to survive in different environments.

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NGSS.HS-LS4-2

NGSS.HS-LS4-4

Occurs when two or more species reciprocally affect each other's evolution

• macroevolution

• microevolution

• coevolution

• parallel evolution

What does the red line stand for?

• Host population

• Parasite population

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NGSS.MS-LS2-2

What is happening to the host population AND parasite population over many generations?

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NGSS.HS-LS2-2

NGSS.HS-LS2-6

At generation 100, which is increasing: the host population or the parasite population? (Look at the lines on the graph above generation 100).

• Host populations

• Parasite population

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NGSS.HS-LS2-6

Around generation 100, what happens to parasite population soon after there is an increase in the host population?

• It increases as well.

• It decreases in response.

• It remains constant.

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NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Why does the parasite population increase soon after the host population increases?

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NGSS.HS-LS2-6

Around generation 180, what do you notice ends up happening to the host population when the parasite population is large?

• It increases as well.

• It decreases in response.

• It remains constant.

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NGSS.HS-LS2-1

NGSS.HS-LS2-2

NGSS.HS-LS2-6

What is the title of this graph? What do you think that means, and what ideas do you think this graph is showing (in your own words)?

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NGSS.HS-LS2-1

NGSS.HS-LS2-2

NGSS.HS-LS2-6

Look at the image closely. What is the independent variable on this graph?

• Generation

• Population

Tags

NGSS.MS-LS2-2