Food Web

All energy transformations in an ecosystem begin with

• a scavenger
• the sun
• a decomposer
• a herbivore

a deer population has significantly increased, the best hypothesis is 

• the deer's main predator has been eliminated
• competition increased
• decreased water levels of local ponds
• organisms that rely on similar food sources migrated to the area

Which event is the best example of competition between species in a pond?

• dragonflies landing on lily pads
• lizards and snakes lying in the sun
• hawks eating mice
• frogs and toads eating flies

Birds eat insects off the skin of cows. If the relationship is a type of mutualism, then the organisms that will benefit are

• only the cattle

• neither the birds or the cattle

• both the birds and the cattle

• only the birds

Which is the smallest level of an ecosystem?

• organsism
• population
• community
• ecosystem

Which relationship describes predator/prey

• hawks and shrubs
• mountain lion and deer
• frogs and trees
• grasses and crickets

A diagram that shows the amount of energy that moves from one feeding level to another is termed..

• energy pyramid
• adaptation
• autotroph
• food web

a system of food chains that shows the transfer of energy  is termed

• food web
• food chain
• prey
• predator

an organism that can produce its own food through photosynthesis

• consumer
• heterotroph
• autotroph
• herbivore

Commensalism is

• one species benefits, the other is not affected
• both species benefit
• both species are harmed
• one species benefit, the other is harmed