Succession...plz help

[darksideofcloud]

i need help with a study guide for my biology class...i need definitions for the following terms...

succession
climax community
decomposer
community
ecology
niche
mutualism
commensalism
parasitism
symbiosis (i really dont understand this one)
autotroph
heterotroph

if you can help with any it would be great...ty all

[darksideofcloud]

i really need help plz i need these definitions

[Dr.Stein]

Well, this is a pretty simple way to know their definitions:

Go to http://www.google.com and type "define: succession" on the search tab. You will see not only one definitions but as much as you need it

Good luck

[Skeletor Rinpoche]

look on google, but if you're confused about symbiosis it is an iterraction between one or more organisms that either both benefit(mutualism) one benefits the other is neither helped nor harmed (commensalism) or one benefits and the other is harmed (parasitism)

[AstusAleator]

To add to Skeletor's post, one or both of the organisms are obligately bound to the other (ie necessary for their survival). Symbiosis is the result of coevolution. For example, some species of cellulase-producing microorganisms can only live in the guts of certain ruminants, and those ruminants can only survive if they have the microorganisms in their guts.
symbiosis literally means living together.