thanks to all of you guys for sharing your experiences. I have just graduated in biology and i am still very confused about my gradate study . I found it very true about finding very few jobs with undergraduate degree in biology. I think it is a huge disadvantage for biology students. So with a open attitude i am  still trying to figure it out,  if i should be changing subject or stick to it. I do think that i dont really like biology like i did before in my high school. I have already spend five years in my undergrad. I feel like life sucks when i think about my future. I just dont want to make a bad choice and regret later. With most of your views it did seem like a tough and bumpy road, if i still continue in biology. I will certainly remember all the suggestions that you guys have given to me and try to do the right thing for my further study.