Describing Populations

What do all the populations in an area make up?

• an ecosystem

• a habitat

• a community

• a niche

Look at the picture of the woods. How many populations are shown?

• one

• two

• five

• ten

The graph below shows population growth of a fruit fly population over time.

The fruit fly population growth over time is an example of:

• Exponential growth

• Logistic growth

Nonnative zebra mussels were first found in a lake near Detroit in 1988.  By 1989, it had colonized all Great Lakes waterways.  Which scenario is most likely true regarding the introduction of this species?

• Native fish naturally ate zebra mussels.

• The higher biodiversity lead to healthier lakes.

• Native mussels were outcompeted by Nonnative mussels for food and other resources.

• Native mussel populations were growing rapidly.

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Two or more members of a particular species living and interacting in the same area

• Community

• Population

• Organisms

• Biosphere

What is the carrying capacity of a population?

• The amount an organism can carry on it's back.

• The largest population an area can support.

• The amount an organism can consume.

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What are "limiting factors" of a population?

• a resource does NOT affect the size of a population

• an environmental condition that does NOT affect the size of a population

• an environmental condition or resource that DOES limit the size of a population of organisms

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What is the carrying capacity of this population?

• 0

• 500

• 2,000

• 10,000

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What happens if a population grows past its carrying capacity?

• The population keeps growing

• The population starts to die off

• The entire species will go extinct

• The carrying capacity just increases

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What term describes the number of individuals of a species per unit area?

• A) Population density

• B) Population size

• C) Carrying capacity

• D) Community