AP Biology Topic 8.3 and 8.4 Population Ecology

Which variable represents carrying capacity?

• dN/dt

• N

• K

• r

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NGSS.HS-LS2-1

As K approaches N, what happened to the dN/dt?

• Slows/Decreases, then increases

• Slows/Decreases, then remains constant

• Increases, then slows/decreases

• Increases, then remains constant

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NGSS.HS-LS2-1

NGSS.HS-LS2-2

When is dN/dt = 0?

• N < K

• N > K

• N = K

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NGSS.HS-LS2-1

Which type of factor is an earthquake?

• Density dependent

• Density independent

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NGSS.HS-ESS1-5

NGSS.HS-ESS2-1

NGSS.HS-ESS3-1

Which type of factor is a disease?

• Density dependent

• Density independent

If N = 500, K = 250, and r = 0.01, solve for dN/dt?

dN/dt = rN(K-N/K)

• -500

• -50

• 50

• 500

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NGSS.HS-LS2-1

NGSS.HS-LS2-2

Which of the following does not represent density?

• Number of bacteria in a 10 mL of nutrient media

• Number of elephants in 1 acre of savanna

• Number of offspring in each generation

• Number of fish in a square mile

What happens to the growth rate as population size approaches carrying capacity?

• Slows

• Increases

• Stay the Same

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NGSS.HS-LS2-1

NGSS.HS-LS2-6

How do density dependent factors affect growth rate?

• As population size increases, growth rate decreases

• As population size increases, growth rate increases

• As population size increases, growth rate stays the same

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NGSS.HS-LS2-6

The black rhinoceros is a mammal found in Africa. Weighing in at up to 1,350 kg, these rhinos can live roughly 35 years. Gestation in the black rhino lasts for 15-16 months, with calves staying under the mother’s parental care for up to four years.

Black rhinos have been hunted extensively by humans for their horns. Poaching pressure has reduced the black rhino population to an endangered level. Ongoing efforts are attempting to save the animal from extinction.

How can the black rhino survivorship strategy be categorized?

• K-selection, type I

• K-selection, type III

• r-selection, type I

• r-selection, type III

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NGSS.HS-LS4-2