Biology I- chapter 59

Age structure refers to __ of individuals of each defined age group.

the relative numbers

The average human population growth rate was low until approx. the year __.

1750

The current world population is approximately __ billion people.

7.96

The __ describes the average number of live births a woman has during her lifetime.

total fertility rate

The __ is the maximum population size that can be sustained by an environment.

carrying capacity

The __ effect is caused by gases in the atmosphere that trap heat and increase Earth's temperature.

greenhouse

As a result of global warming, sea levels are expected to __ due to the melting of glaciers.

increase

Ecological footprint measures the __ needed to support a person.

productive land

Habitat destruction prevents a natural habitat from supporting the species that were originally __.

present

__ species are those moved by humans from their native location to a different location.

Introduced