I need help with Biology...?

Question

Currently there is a trend to move to a 3 domain system of classification. Describe how this system is different from the traditional one.

I need help with this question, it's for my AP Bio Summer's Hw. It is also my last question so I am assuming it's the hardest.

Note: Carl Woese is a professor who is prominent in this movement.

Answer 1

The 2 domain system includes domains prokaryota (aka monera) and eukaryota. Prokaryotes are organisms that do not have a nucleus or organelles in their cells, and eukaryotic cells do have nuclei and organelles. The 3 domain system of classification consists of archaea, bacteria, and eukaryota. Archaea consists of organisms that can live in extreme conditions, such as extremely hot or cold temperatures.

Answer 2

Heres the wiki page for his 3 domain system. I can't spot a trend but hope this helps.

http://en.wikipedia.org/wiki/Three-domai...