Ecology 2021

A bee receives nectar from a flower and carries the pollen to other flowers:

• predation

• parasitism

• mutualism

• commensalism

Mistletoe grows and spreads on trees, taking their nutrients:

• predation

• parasitism

• mutualism

• commensalism

What would be a good example of a primary consumer?

• carnivore

• detrivore

• decomposer

• herbivore

Which organisms would be at the top or last trophic level?

• plant

• herbivore

• omnivore

• carnivore

The monkey would be a

• decomposer

• producer

• primary consumer

• secondary consumer

Mice might grow in population and destroy the community by eating all of the berry bushes if

• wolves and snakes were removed from the food web

• another predator migrated in to the community

• the snake population grew

• none of these

What percentage of energy is passed on to the next trophic level?

• 5%

• 10%

• 50%

• 90%

Why are producers found at the base of the pyramid?

• They create all of the energy and therefore have the most energy of all of the trophic levels
• There are more plants than animals. 
• They begin the flow of energy in an ecosystem.
• All of these answers are correct. 

What is the ultimate ORIGINAL source of energy for living things

• Sugar
• Sun
• Moon
• Carbon Dioxide

A living or once-living organisms in an ecosystem is a

• population
• biotic factor
• abiotic factor
• community