Which pair of organisms are scavengers?
fungi and bacteria
bears and humans
algae and plants
catfish and vultures
catfish and vultures
Which are common decomposers?
caterpillars and deer
catfish and vultures
mushrooms and bacteria
plants and algae
mushrooms and bacteria
How does energy enter most ecosystems?
producers
decomposers
water
sunlight
sunlight
Which describes producers?
They make their own food from water, oxygen, and sunlight.
They break down wastes and return raw materials to the ecosystem.
They are the source of all food in an ecosystem.
They obtain energy by feeding on other organisms.
They make their own food from water, oxygen, and sunlight.
How much energy is passed from one level of an energy pyramid to the next?
25 percent
100 percent
50 percent
10 percent
10 percent
Which is the study of where organisms live?
climate conditions
biogeography
continental drift
biogeology