Unit 5 - Population Ecology & Human Population Growth

Which of the following is NOT a way in which reproduction is constrained?

• scarcity of resources

• ideal environmental conditions

• competition

• disease

Tags

NGSS.MS-LS2-1

NGSS.MS-LS4-4

The maximum reproductive rate of an organism, given access to unlimited resources & ideal environmental conditions.

• carrying capacity

• logistic growth

• biotic potential

• population momentum

Tags

NGSS.HS-LS4-2

Which of the following statements is NOT true of exponential growth?

• Graphically, appears as a J curve (initially, small population increase, followed by quick increase with a fixed growth rate

• Always exhibits the full biotic potential of the organism

• A growth rate with no limit

• Expressed as an exponent which is used as a multiplier to the existing population

In the exponential growth equation, r represents the rate of growth.

Which of the following relationships is TRUE?

MARK ALL THAT APPLY.

• r zero = population size is zero

• positive r = population is increasing

• negative r = population is decreasing

• r cannot be a negative number = that would mean the population was extinct

Which of the following statements does NOT relate to carrying capacity?

• The biomass of organisms that can be supported in a particular habitat.

• A limit of sustainability that an environment has in relation to the size of a species' population.

• When a population exceeds carrying capacity, birth rates continue to rise.

• When the deaths exceed births, growth rate becomes negative, resulting in dieback (population crashes)

Tags

NGSS.HS-LS2-6

NGSS.HS-LS2-1

Which of the following statements is TRUE of logistic growth?

MARK ALL THAT APPLY.

• There is a relationship between the population size at any time and the carrying capacity.

• If resources are unlimited, populations with logistic growth will still be slow growing.

• If N (current population size) is less than K (carrying capacity) = positive growth.

• There is no relationship between the population size and the environmental resources in logistic growth.

• Logistic growth is impacted by internal & external factors; appears as an S curve on graphs

Tags

NGSS.HS-LS2-6

NGSS.HS-LS2-1

Which of the following factors are density-dependent?

• disease

• floods

• wildfires

• soil acidity

Tags

NGSS.HS-LS2-6

Which of the following factors are density-independent?

• food availability

• competition

• drought

• predation

Which of the following are characteristics of r-selected species?

MARK ALL THAT APPLY.

• Conservative reproduction

• Population growth regulated mainly by external factors

• High mortality of offspring

• Longer generation times

Which of the following are characteristics of K-selected species?

MARK ALL THAT APPLY.

• Rapid reproduction

• Given optimum condition, can grow exponentially

• Regulated by external & internal factors

• Relatively few offspring

Tags

NGSS.HS-LS4-2