Ecosystems Review 24

When an ecosystem is affected by loss of shelter, what happens to the populations in the ecosystem?

• They can decrease or die out.

• They can readily adapt to the changes.

• They are not usually affected.

• They can increase.

Which term best describes two predators living in the same habitat who feed on the same prey?

• symbiosis

• mutualism

• competition

• coexsistence

Which shows the correct flow of energy through this simple food chain?

• grass → rabbit → fox

• fox → grass → rabbit

• rabbit → grass → fox

• grass → fox → rabbit

Which are major abiotic factors that determine the types of plants that can grow in an ecosystem?

• birds and bees

• precipitation and bees

• birds and temperature

• precipitation and temperature

In the ocean, a sea anemone attaches itself to the shell of a hermit crab. The stinging arms of the sea anemone protect the hermit crab, while the movement of the hermit crab brings food to the sea anemone. Which best describes the relationship between the sea anemone and the hermit crab?

• symbiosis

• commensalism

• mutualism

• parasitism

Where do plants get most of the energy they need to live and grow?

• water

• soil

• air

• sunlight

A woodland area where deer live is partially cleared to build homes for people. Which best describes how the deer population will change as a result of clearing the land to build homes?

• The deer population will increase.

• The deer population will remain the same.

• The deer population will migrate to a new habitat.

• The deer population will decrease.

Dead matter and waste would pile up without which type of organism?

• decomposer

• consumer

• scavenger

• producer

Which level of a food chain has the most energy?

• producers

• consumers

• decomposers

• scavengers

Estuaries often have marsh grasses that act as a safe nursery for young fish. Which limiting factor, provided by estuaries, does this describe?

• predators

• shelter

• space

• food