What structure is found in prokaryotic cells but not eukaryotic cells? a. a single, circular DNA chromosome found in the cytoplasm
b. a chromosome that contains many histones
c. a chromosome found within a membrane-bound nucleus
d. a shorter, condensed chromosome in the nucleus

What structure is found in prokaryotic cells but not eukaryotic cells?

a. a single, circular DNA chromosome found in the cytoplasm

because :

Prokaryotic cells may also contain extrachromosomal DNA, or DNA that is not part of the chromosome. This extrachromosomal DNA is found in plasmids, which are small, circular, double-stranded DNA molecules.

the offspring would all be white. if the parents are both white flowers then they have the genotype rr, which when crossed results in an all white punnet square.