Ecology Test Review 2024

The role of decomposers in an ecosystem is to:

• convert the sun's energy into energy stored as food
• convert plant matter into matter that can be used by animals
• eat other living organisms for energy
• break down dead and waste matter

A new species of fish has been introduced into Lake Hiawatha. This fish eats minnows, a smaller fish that already live in the lake. What is the most likely to happen to the population of minnows in Lake Hiawatha?

• it will increase
• it will decrease
• it will stay the same
• it will first increase, then decrease

A new species of fish has been introduced into Lake Hiawatha. This fish eats minnows, a smaller fish that already live in the lake. What is most likely to happen to the population of the new species of fish in Lake Hiawatha?

• it will increase
• it will decrease
• it will stay the same
• it will first increase, then decrease

A new species of fish has been introduced into Lake Hiawatha. This fish eats minnows, a smaller fish that already live in the lake. The introduction of this new species of fish into Lake Hiawatha provides an example of :

• competition
• parasitism
• predation
• mutualism

Not changing or resistant to change is the definition for what word?

• disruption
• unstable
• stable
• food web

A disturbance that effects an ecosystem is the definition for what word?

• disruption
• unstable
• stable
• food web

An organism that gets its food from dead organisms and wastes from living organisms is the definition for what word?

• decomposer
• consumer
• producer
• omnivore

A diagram that models feeding relationships within an ecosystem is the definition for what word?

• energy pyramid
• unstable
• stable
• food web

A simple model of energy flow within a food web is an?

• energy pyramid
• unstable
• consumer
• food web

When an ecosystem does not return to its original state and it changes permanently it is said to be?

• disruption
• unstable
• stable
• food web