A leading strand because it breaks off into the front of the cell
Ok here we go:
Science starts with observing which leads to hypothesis, which is tested by experiments.
The other two i am not sure of. Hope i was a help to you. One thing you can do to figure out the other two is google: "what type of science includes medicine and envirnmental science", and do the same for the other one.
Explanation:
It's little bit short but it will help you and you can get full mark hope it will help you! Have a nice day. ^_^
Hope this helps at least a little :)
Do excrete all the toxins from our food and body, yes we need to pee.
