biology

who can help me? whole day, i study for biology. now not even finish and my brain cannot afford to put in something else... my brain is fill with the word, CELL. this time i choose to revise from reference book instead of text book. i still have one more chapter to go which is the topic about locomotion... most probably i will continue on tomorrow, then is time for chemistry~ so glad that physics is the last one. i can use fri, sat and sun to revise... almost time for me to sleep... hopefully everything will be better tomorrow...