Biology help??

Question

1) what's the difference between an open and closed circulatory system?and which was is more complex?how?

2) what's the difference between central and simple/complex nervous system? is central nervous system complex than the simple nervous system?how?

3) Which digestive system is more complex? how?

-abosorptive

-photosynthetic

-ingestive

Answer 1

Sorry, can't do your homework for you.

You should consider yourself very fortunate to live in these ages when all you have to do is google it and voila ! It's there.

I used to spend many hours every week in the library, reading.

It will take you 15 min MAX to find your answers.

Best place to look is http://en.wikipedia.org

Good Luck !