How do you pass a biology exam?

I took the ged exam and i failed by 210 points.. i want to kno how do i make those points up to pass? i took 3 parts over but i dont feel i did very well in 2 of them.. how are the scores devided?

What characteristics of a new organism can help you decide if it is a very slow-moving animal or a plant that responds to light and touch?

What is the problem faced by multicellular organism when their size increases?

An irregular object with a mass of 20g displaces 10ml of water when placed in a large overflow container. caculate the density of the object

Which organelle produces steroid hormones in the tests while detoxifying alchol in the liver?