Some biology question...hel..

I try to find the answer but i dont know where. Also i dont understand some question. Please explain. Thank you

how are chlorophyll a and chlorophyll b different?

What is the function of the mocule tail?

what are the dual roles of accessory pigments?

What is the net effect of the action of Photosystem I and II?

Thank you very much!!!

http://www.nature.com/nsmb/journal/v8/n7...

Photosystem I evolved very early; photosystem II evolved later.

http://faculty.clintoncc.suny.edu/facult...

just google each word, that's all i did for the last Q.

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