Population Dynamics

The graph below represents the growth of a population of flies in a car? Which of the following statements best describes the graph?

• The fly population did not change.

• The fly population decreased, then increased.

• The fly population grew following the logistic growth model.

• The fly population grew following the exponential growth model.

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NGSS.MS-LS2-1

Why is biodiversity important to ecosystems?

• It allows ecosystems to adapt to changing climates.

• It establishes the separate ecosystems within a biome.

• It has created antibiotic-resistant bacteria

• It provides each organism with one specific role to ensure there is no competition.

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NGSS.MS-LS2-2

NGSS.MS-LS2-5

Which of the following could be a density-independent limiting factor in the desert?

• number of prey

• food supply

• parasitism

• rainfall

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

Abiotic factors are nonliving things in an ecosystem. Select the list that only contains abiotic factors.

• variety of food sources, annual precipitation, and number of decomposers

• the density of predators, water depth, types of parasites

• precipitation amount, number of prey species, plant types

• water temperature, amount of sunlight, soil type

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NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which point in this graph represents exponential growth?

• Point E

• Point A

• Point B

• Point C

The graph represents _____ of a population.

• logistic growth model

• exponential growth model

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NGSS.HS-LS2-1

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Which point on the graph best represents the carrying capacity?

• Letter A

• Letter C

• Letter E

• Letter D

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

In which month(s) did the Cottontail Rabbits reach their carrying capacity?

• January and February

• March and May

• April and January

• April and May

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

Owls and snakes eat mice and other organisms. What would happen to the mice population if the owl population decreased?

• The population would decrease, as the loss of owls as part of their diet is a limiting factor.

• The population would decrease, as shelters created by owl nests is a limiting factor.

• The population would increase, as competition for food is a limiting factor.

• The population would increase, as predation by owls is a limiting factor.

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NGSS.MS-LS2-4

Which of the following is density-independent limiting factor?

• disease

• competition

• earthquake

• predation