7-2 Ecosystems review

The process of a species disappearing forever

• biosphere

• natural habitat

• extinction

• population

• species

A group of interacting individuals of the same species

• biosphere

• natural habitat

• extinction

• population

• species

The place where an organism naturally lives and grows

• biosphere

• natural habitat

• extinction

• population

• species

A group of living things that have similar genes capable of reproducing

• biosphere

• natural habitat

• extinction

• population

• species

The sum of all living matter on Earth

• biosphere

• natural habitat

• extinction

• population

• species

When contaminants are picked up by runoff, the effects can be harmful because the water that living organisms depend on becomes __________.

• polluted

• extinction

• positive

• increase

Human activities, such as overfishing and dumping pollutants into the ocean, can have a great impact, even causing __________ of some marine life.

• polluted

• extinction

• positive

• increase

Artificial reefs have a(n) __________ impact on the environment because they help create underwater ecosystems.

• polluted

• extinction

• positive

• increase

Typically, as human populations increase, the negative impacts on Earth __________.

• polluted

• extinction

• positive

• increase

What is the definition of biotic?

• living things in an ecosystem

• nonliving things in an ecosystem

• a characteristic that helps an organism survive and reproduce in its environment

• squirrels