Simple Science Exam Help

I have a very weak area of Science.I can absorb as much knowledge and remember it as I can when it comes to certain things.However when I am asked in tests what you would need to think about before you do something in a situation,I am lost.I am just out of imagination


For example,what things would I need to think about to decide if I should support In Vitro Fertilisation or not.
One thing I came up with is that will it lead to designer babies.But that's the only thing I can think of.I'm just lacking in common sense.

My exam is in a week and i'm revising as much as I can,but I need to know things I could think of for almost any situation where it will ask you what to think about or what I have to take in to account in Biology.
Anyone have any ideas?

think of advantages and disadvantages
advantages
-reducing the chances of transferring disease genes to child, by testing the embryo first before implantation
-helps fertilization in women that cant get fertilized normally


disadvantages
-can lead to designer children as you said
-expensive
-can lead to multiple births at once, like the woman who had 8 babies

im sure theres more points you can think of. What you need to do is link the topic to different aspects of life and see how it affects them, then the ideas on the topic. Thinking is all about relating what you have to think about with other aspects of life.

Good luck on the exams :P