Population Dynamics

Without other changes to a population, which of the following will cause a population to increase in size?

• The birth rate equals the death rate.

• The birth rate is less than the death rate.

• The birth rate is greater than the death rate.

• The birth rate and the death rate both equal 0.

When a population grows past the ecosystem's carrying capacity, what happens to the population?

• Continues to grow

• The population starts to die off to return to carrying capcity

• The population will go extinct due to lack of resources

• The population grows then finds a new carrying capacity

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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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Review the graph provided. What statements can be made about the significant decline in wolves around 1979?

• The wolf decline was a direct result of moose decline.

• The is no way to know why the wolf population dropped.

• The drop is most likely due to the declining moose population, but more information would be needed to determine that.

• The drop is most likely due to the increasing moose population, but more information would be needed to determine that.

• The wolf decline was a direct result of the moose increase.

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NGSS.MS-LS2-1

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When death rate is equal to birth rate the

(a)   . When the death rate is greater than the birth rate ​​ the (b)   . When the birth rate is greater than the death rate the ​ ​ (c)   .

• population increases

• population stays the same

• population decreases

If a population grows larger than its environmental carrying capacity, then

• death rate may rise.

• death rate may fall significantly.

• birth rate may rise significantly.

• immigration rate may increase.

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NGSS.MS-LS2-4

birth rate - death rate = ?

• density

• growth rate

• dispersion

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Why don't populations grow indefinitely?

• limiting factors

• only biotic factors

• only abiotic factors

• none of the above

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NGSS.MS-LS2-4

Which claim is supported by the data?

• 
  The range of the buffalo population decreased over time.

• The population density of the buffalo is increasing over time.

• The population of buffalo is experiencing exponential growth.

• The buffalo population is adapting quickly to its environment.

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

Calculate the growth rate for this scenario: In a population of deer 20 new fawns are born, 7 deer of various ages die, 3 new does immigrate, and 2 young bucks emigrate from the group (Show your work -- example: a + b - c = d

Mathematical Equivalence

ON

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