Ecology Review

A relationship between two organisms in which one organism benefits and the other is unharmed or benefitted.

• Mutualism 
• Competition
• Parasitsm 
• Commensalism 

A relationship between two organisms in which both organisms benefit. 

• Mutualism 
• Competition
• Parasitsm 
• Commensalism 

A relationship between two organisms where one benefits and the other is harmed.

• mutualism

• parasitism

• commensalism

Relationship between two organisms where one is the hunter and the other is the hunted.

• predation

• mutualism

• commensalism

• parasitism

When two organisms use the same resources in an area

• competition

• predation

• mutualism

• commensalism

Why do the steps in an energy pyramid get smaller as you go up?

• There is only one animal in the population for apex predators.

• Less energy is available as you go up the chart.

• More energy is available as you go up

Which of the following would be the most likely effect, if there were a sudden increase in the cricket population?

• There would be a decrease in the small bird population.

• There would be a decrease in the grass/flowers population.

• There would be a decrease in the mice population.

• There would be an increase in the grass/flowers population.

Why might an organism have more than one arrow coming from them in a food web?

• More than one organism may eat them. 
• They may eat more than one other organism. 
• This organism gets its energy from multiple sources. 
• They have no resources available to them.

Replacement of one type of community by another at a single place over time

• symbiosis
• succession
• competition
• cooperation

What is the goal of the pioneer species in Primary Succession?

• To kill the dead materials after a disaster
• To rebuild soil for the next sized plant

• To feed Johnny
• To put fresh oxygen into the air