Chapter 21 Population and Communities

A population’s __________ is the number of offspring produced over a given time period.

• birthrate

• death rate

• community

• species

Tags

NGSS.MS-LS1-4

A population’s __________ is the number of individuals that die over the same time period.

• birthrate

• death rate

• community

• extinction

If the ___________ is higher than the _________, the population increases

• birthrate, death rate

• death rate, birthrate

• community, species

• species, community

During exponential growth, as a population gets larger, it grows at a(n) ___________.

• faster rate

• slower rate

• unchanged rate

A species that has died out and that has no living individuals.

• extinct species

• endangered species

• threatened species

• exponential species

Tags

NGSS.MS-LS4-1

A species whose population is at risk of extinction.

• extinct species

• endangered species

• threatened species

• exponential species

Tags

NGSS.MS-LS2-5

NGSS.MS-LS4-4

A species that is at risk but is not yet endangered.

• extinct species

• endangered species

• threatened species

• exponential species

The instinctive seasonal movement of a population of organisms from one place to another.

• migration

• hibernation

• immigration

• emigration

Which factor does not normally affect human population size?

• birthrate

• death rate

• population movement

• lack of resources

Tags

NGSS.MS-ESS3-4

This takes place when organisms move into an area.

• migration

• hibernation

• immigration

• emigration