Unit 3 Part 2 Ecology Test Review

Which is least likely to cause oxygen depletion in aquatic environments?

• an increase in organic waste in the aquatic system

• an increase in dead and decaying organic organisms

• an overabundance of algae in an aquatic ecosystem

• a constant flow of water moving through layers of temperature

The bacteria Escherichia coli (E. coli) live in the intestines of humans and make vitamins such as vitamin K and B-complex vitamins. Which would BEST describe the relationship between E. coli and humans?

• The E. coli benefit and humans are harmed.

• There is only a benefit for the humans.

• There is only a benefit for the E. coli.

• The E. coli and humans both benefit.

What is the relationship between an ecosystem and a community?

• A community is a very large ecosystem.

• An ecosystem is a very large community

• An ecosystem includes a community and abiotic factors

• A community includes an ecosystem and abiotic factors.

An ecosystem is MOST likely to return to its original condition after which of these occurs?

• New predators are introduced to control a pest population.

• A marsh is filled in to make space for a new parking lot.

• Tall prairie grass burns after being struck by lightning.

• Flood waters erode the banks of a narrow stream

A teacher makes a two-column chart on the board. He asks the students to list situations that relate to primary succession. Which statement should be included under primary succession?

• New trees grow in an area that was hit by lightning.

• New plants grow on the surface of a hardened lava flow

• New trees grow after a forest fire has destroyed all trees

• New plants grow in an area that once was a field of flowers.

What will most likely occur if the population of the world continues to increase at predicted rates?

• There will be an increase in biodiversity as a result of improvements in technology.

• There will be more rapid depletion of natural resources.

• The human race will rapidly become extinct.

• All human diseases will be eliminated.

Which action does not demonstrate resource conservation?

• using paper plates

• collecting rainwater

• using a reusable water bottle

• turning off electric devices when not in use

How do plants play a critical role in the carbon cycle?

• Plants have special bacteria that live in their roots.

• Plants release carbon dioxide during cellular respiration

• Plants are chemically converted to fossil fuels when burned

• Plants allow carbon to enter an ecosystem through photosynthesis.

Can respiration occur without sunlight?

• No, because sunlight powers respiration.

• Yes, because respiration is powered by the breaking of glucose molecules.

Does an organism need to photosynthesize if they can respire?

• No, because heterotrophs (animals) can gather food to eat for energy.

• Yes, because heterotrophs (animals) must be able to use solar energy to make food.

• Yes, because autotrophs (plants) must be able to use solar energy to make food.

• No, because autotrophs (plants) can gather food to eat for energy.