Chapter 8 Review

An organism's habitat must provide all of the following EXCEPT

• food
• water
• predators
• shelter

The nonliving parts of an ecosystem are called

• populations.
• organisms.
• biotic factors.
• abiotic factors.

To produce their own food, algae and plants use the abiotic factors sunlight, carbon dioxide, and

• soil.
• salt.
• water.
• bacteria.

A population is all the members of one species living in a particular

• area.
• habitat.
• ecosystem.
• community.

A group of antelope leaving the herd in search of better grassland is an example of

• immigration.
• emigration.
• increasing birth rate.
• decreasing death rate.

If you count 20 beetles in a garden measuring 5 square meters, the population density of the beetles is

• 100 beetles per square meter.
• 20 beetles per square meter.
• 5 beetles per square meter.
• 4 beetles per square meter.

An organism's particular role in its habitat, or when and how it survives, is called its

• carrying capacity.
• ecosystem.
• competition.
• niche.

All of the following are examples of limiting factors EXCEPT

• food.
• soil.
• space.
• weather conditions.

Which of the following is an example of a predator adaptation?

• a porcupine's needles
• a shark's powerful jaws
• a frog's bright colors
• a plant's poisonous chemicals

The part of an ecosystem where an organism lives and feeds is called the organism's ____________________.

• adaptation
• ecosystem
• habitat
• emigration