Ecosystems

The fennec, arctic, and gray foxes have different appearances because

• they belong to different kingdoms

• they have adapted to different environments

• they are hybrids of two different species

• their appearances change from season to season

Which statement about adaptations is true?

• Adaptations include body structures but not behaviors.

• Adaptations occur when one individual develops better survival characteristics.

• Adaptations develop during the lifetime of an individual.

• Adaptations occur when survival characteristics are passed from one generation to another.

What happens to a species that cannot adapt to changing conditions in its environment

• The individual organisms die

• The species may become extinct.

• The species moves to another environment.

• The individual organisms move to other environments

Which type of organisms get energy by breaking down the remains of dead organisms?

• parasites

• producers

• consumers

• decomposers

How is a food chain related to a food web?

• They are not related

• Food chains make up a food web

• Food webs make up a food chain.

• Food webs run parallel to food chains

An organism that harms another in a symbiotic relationship is a

• prey

• polluter

• parasite

• predator

What type of interaction does the diagram above show?

• food web

• food chain

• energy pyramid

• energy chain

Why does the amount of available energy decrease at higher levels of the energy pyramid?

• the upper-level organisms do not need as much energy.

• There are more upper-level organisms than lower-level organisms

• Other substances move up the pyramid and take away some of the energy.

• Some energy is used by organisms at each level for their own life processes

When different species with similar needs live in an ecosystem with limited resources, what will happen?

• They will live peacefully together.

• They will compete for available resources.

• Some organisms will become prey and eat other organisms.

• One species will adapt so that they will have different needs.

Barnacles live on the side of a whale. The barnacles benefit but do not help or harm the whale. What kind of relationship is this?

• parasitism

• symbolism

• mutualism

• commensalism