Unit 5 - Population Ecology & Growth REVIEW

Front

What is a potential risk associated with GMOs?

Back

Possibility of unknown health concerns for humans.

Front

Approximately how many humans were on Earth in 1850?

Back

1 million.

Front

What is NOT an effect of deforestation?

Back

Eutrophication causes many organisms to die due to a lack of sunlight and/or oxygen.

Front

How did advancements in energy production affect human populations?

Back

Increased.

Front

Which greenhouse gas makes up over half of the emissions from human activities?

Back

Carbon dioxide.

Front

Define population ecology.

Back

The study of how populations interact with their environment and how they change over time.

Front

What is carrying capacity?

Back

The maximum number of individuals of a species that an environment can support sustainably.

Front

What is the difference between density-dependent and density-independent factors?

Back

Density-dependent factors are influenced by population density (e.g., competition, predation), while density-independent factors affect populations regardless of density (e.g., natural disasters).

Front

What is the significance of the demographic transition model?

Back

It describes the transition from high birth and death rates to low birth and death rates as a country develops.

Front

What role do keystone species play in an ecosystem?

Back

They have a disproportionately large effect on their environment relative to their abundance.