Biodiversity Unit Test

In a food chain or food web, the arrows show the

• flow of energy.

• direction of travel.

• none of the above, there are no arrows in a food chain.

Which organisms shown above compete for the same food source in this environment?

• Hawks and Frogs

• Frogs and Snakes

• Decomposers and Grasses

An organism that can make its own food is called a(n)

• consumer

• scavenger

• autotroph

A food web or food chain always begins with the ________.

• sun.

• scavenger.

• consumer.

The diagram above is a(n)

• food chain.

• food web.

• energy pyramid.

succession that occurs in an area with no soil

• ecological succession 
• primary succession 
• secondary succession
• pioneer speciles

succession that occurs in an area where soil is already present

• ecological succession 
• primary succession 
• secondary succession
• pioneer speciles

the first organisms that appear in an ecological community

• ecological succession 
• primary succession 
• secondary succession
• pioneer speciles

a stable ecological community that has reached equilibrium

• ecological succession 
• climax community
• secondary succession
• pioneer speciles

starts with bare rock followed by lichen

• primary succession 
• secondary succession
• both types of succession