What can be found in prokaryotic cells? Select all that apply.

A. DNA

B. nucleus

C. ribosomes

D. plasmids

I think all of the above but I am not quite sure... this question popped up on my unit test and I wanted to ask to make sure.

Long term exposure to waves can cause sunburns and skin cancer.

Ras is a g-protein that is activated when a growth factor attaches to egfr. its activation results in the replacement of a gdp molecule with a gtp molecule, thus allowing a signal transduction pathway to be activated. considering the signal pathway illustrated on this page, what is one potential outcome of a mutation in the ras gene that leads to ras protein hyperactivity. be specific.

Which body region are part of the cephalic region?