Population Density

Which of the following tells you population density?

• the number of births per year

• the number of frogs in a pond

• the number of deaths per year

• the number of bacteria per square millimeter

Which of the following is NOT one of the factors that play a role in population growth rate?

• immigration

• death rate

• emigration

• demography

Tags

NGSS.HS-LS2-2

If immigration and emigration numbers remain equal, which is the most important contributing factor to a slowed growth rate?

• increased birthrate

• constant death rate

• decreased birthrate

• constant birthrate

Tags

NGSS.MS-LS1-5

The movement of organisms into a range is called

• immigration

• emigration

• population shift

• carrying capacity

Which are two ways a population can decrease in size?

• immigration and emigration

• increased death rate and immigration

• decreased birthrate and emigration

• emigration and increased birthrate

Each of the following is a density-dependent limiting factor EXCEPT

• competition

• temperature

• crowding

• disease

Tags

NGSS.MS-LS2-4

Which of the following is a density-independent limiting factor?

• earthquake

• disease

• emigration

• parasitism

The graph shows the growth of a bacterial population. Which of the following correctly describes the growth curve?

• logistic

• limiting

• demographic

• exponential

For most populations that are growing, as resources start to become less available, the population

• declines rapidly

• increases more rapidly

• reaches carrying capacity

• enters a phase of exponential growth

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which will reduce competition within a species’ population?

• fewer individuals

• higher birthrate

• fewer resources

• higher population density

Tags

NGSS.MS-LS2-1