Ecology Vocabulary Review Challenge

What does an ecosystem include?

• Only living organisms

• Only animals and plants

• Only non-living elements

• Both living organisms and non-living elements

What is a population in ecological terms?

• All species in a region

• All animals in a region

• All plants in a region

• All members of one species in an area

Which species are known to be successful due to lack of predators?

• Marine species

• Endangered species

• Invasive species

• Native species

What do detritivores return to the soil?

• Nitrogen

• Oxygen

• Carbon

• Phosphorus

Which term describes organisms that help decompose dead material?

• Carnivores

• Decomposers

• Herbivores

• Omnivores

What is mutualism?

• A relationship where one organism benefits and the other is unaffected

• A relationship where both organisms benefit

• A relationship where both organisms are harmed

• A relationship where one organism benefits at the expense of the other

What happens to predator populations when prey populations increase?

• Become extinct

• Increase

• Stay the same

• Decrease

What is commensalism?

• One organism benefits, the other is unaffected

• Both organisms benefit

• Both organisms are harmed

• One organism is harmed, the other benefits

What is the effect of a decreasing elk population on aspen trees?

• Aspen trees decrease in number

• No effect on aspen trees

• Aspen trees become shorter

• Aspen trees get taller

What type of organism is an elk in relation to aspen trees?

• Predator

• Prey

• Herbivore

• Carnivore