Carrying Capacity

Without any limiting factors, growth of a population will be exponential. Limiting factors can be density dependent or density independent. Identify the example of a density independent factor.

• Competition for resources

• Natural disasters

• Predation

• Crowding

Identify the term that correctly describes the number of mice indicated by R

• Plateau number

• Carrying capacity

• Peak population

• Population maximum

The highest rate of reproduction of a population under ideal conditions is called the:

• Biotic potential

• Environmental resistance

• Carrying capacity

• Birth rate

A particular country has negligible immigration and emigration. In 2017 its population size increased from 50 million to 51 million. If the birth rate was 30 individuals per thousand, then the death rate (per thousand) in 2017 was:

• 10

• 20

• 30

• 40

If two male and eighteen female wallabies are introduced onto a brush and grass covered island where there are no natural enemies or other large animals, what will happen in future years?

• The wallaby population will remain at 20.

• The wallaby population will get smaller.

• The wallabies will die from diseases.

• The population will continue to rise until there is little grass left.

An organism is small in size and has a short life span. It is fast maturing and produces many offspring at a young age. The young stay with the mother for only a short period of time. It is likely that this organism is:

• A K-strategist

• An r- strategist

• Initially an r-strategist and becomes a K-strategist at maturity

• Intermediate between an r- and K-strategist

The largest number of individuals that an environment can support long term is...

• Carrying capacity

• Emigration

• Immigration

• Population density

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

Something that regulates the size of a population is called...

• A limiting measure

• A limiting factor

• Carrying capacity

• Biodiversity

What are factors that affect carrying capacity?

• Biotic only

• Biotic and abiotic

• Depends on the ecosystem

• Abiotic only