LE_1.2_Ecosystems_ReviewQuiz

What is a population in an ecosystem?

• All the species that interact in a particular environment

• All the individual members of one particular species in the same area at the same time

• All the living and nonliving things that exist in a specific area

• The process of succession in an ecosystem

Which of the following interactions benefits both organisms involved?

• Predation

• Parasitism

• Mutualism

• Commensalism

What is the main characteristic of freshwater ecosystems?

• Presence of coral reefs

• Moderate to high salinity

• Very low salinity

• High temperature

What occurs during primary succession?

• A predator hunts and consumes prey

• Communities form in an area previously uninhabited by organisms

• New communities form after a major disturbance

• Species compete for the same resources

In which type of ecosystem do estuarine ecosystems occur?

• In deserts

• Where freshwater and ocean water meet

• In ponds and lakes

• In coral reefs

Which process is responsible for the conversion of atmospheric nitrogen into a form usable by plants?

• Nitrogen fixation

• Decomposition

• Photosynthesis

• Respiration

What term describes the role an organism plays in its ecosystem?

• Community

• Niche

• Habitat

• Population

All the biotic and abiotic parts of the environment is a:

• Organism

• Population

• Community

• Ecosystem

When the last member of a species dies, the species becomes

• threatened

• endangered

• extinct

• Critically endangered

Match the following

• Commensalism

• 
• Competition

• 
• Mutualism

• 
• Predation

• 
• Parasitism

• 

Answer explanation

Predation-predator eats the prey

Mutualism-both organisms benefit

Commensalism-one organism benefits and one is unaffected

Parasitism-one organism benefits and is harmed

Competition-organisms are fighting for resources