Ecosystems Review Quiz

Which is the best term to describe organisms living together in their ecosystem>

• Parasitism

• Competition

• Coexistence

What impact do resources, such as sunlight and water, have on a forest ecosystem?

• They alter the rate of photosynthesis, resulting in more oxygen being produced.

• They decrease the number of diseases resulting from overpopulation.

• They increase habitat areas for new organisms entering the ecosystem.

• They limit the carrying capacity of the ecosystem.

Decomposers increase the fertility of the soil and prevent dead organisms from building up in the environment. In which way do decomposers make the soil more fertile?

• by adding carbon

• by adding nitrogen

• by removing excess water

• by removing excess nutrients

Which is an example of cooperation?

• cannabalism

• commensalism

• parasitism

• mutualism

Some organisms obtain their food from a host organism. Which is the best example of this relationship?

• Ants protecting a tree that produces their food.

• A flea getting nourishment from a cat’s blood.

• A bird building a nest on a tree branch.

• A bat pollinating a saguaro cactus.

In Florida, black bears are found in only a few regions. Roads and highways cross all of these regions. If road construction continues through the regions occupied by the bears, how will black bear populations most likely be affected?

• The populations will increase as the bears spread out to other areas.

• The populations will increase because other herbivores will move out.

• The populations will decrease due to pollution caused by cars and trucks.

• The populations will decrease as they have less area to find food and shelter.

In any ecosystem, organisms interact with biotic and abiotic parts of the environment. As a result of all of the interactions, the matter within the system is (think of Law of Conservation of Mass)

• produced when plants grow.

• recycled when organisms die.

• lost when animals and plants die

• formed when new animals are born.

Which organisms contribute most to the decomposition of dead organisms?

• snakes

• viruses

• insects

• bacteria

Biotic nitrogen fixation is performed by certain

• lichens

• viruses

• bacteria

• mammals

Which group in a food web is most likely to change atmospheric nitrogen into forms that are usable?

• scavengers

• decomposers

• producers

• consumers