Answer:
A. are all elements the rest are combinations of elements
The answer is B I believe, They contain genetic material.
Hope this helped :)
Answer:
Phospholipids heads are negative and attracted to water.
Just so you know the “head” of a lipid present in your cell membrane is considered to be are referred to as hydrophilic meaning attracted to water were as the "tail" of the lipid is considered to be hydrophobic as you might of surmised meaning hating water I suppose.
B) Nucleus!
Prokaryotic cells do not have a nucleus, and the Nucleus in a Eukaryotic cell are large and very hard to miss (if that matters to you!)