To function, ecosystems require an input of energy. Where does this energy come from?

Answer 1

Please post your answer, and we'll be glad to comment on it.

Answer 2

parasitism and predation, one organism benefits at the expense of another. What is the difference between the two processes

Answer 3

DrBob answered this for you last night.

http://www.jiskha.com/display.cgi?id=1195096465.1195097566

Please don't keep reposting the exact same question. If there's something you don't understand about the answer, please tell us what you don't understand, and we'l work with you. But, when you keep reposting the same question, we assume you haven't even read the original answer.

Answer 4

ok I know the 1st part. but I can not find the answer to the 2nd part. Please help

Answer 5

Thanks for clarifying. We'd appreciate it if you restated your question asking about what you don't know. Please click Post a New Question and start a new thread.