All but one of the prokaryotes without peptidoglycan in their cell walls are Archaea. What group is the exception and why

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.

i think the answer is gold im not entirely sure

yes

no

blue is scattered more than other colors because it travels as shorter, smaller waves. this is why we see a blue sky most of the time.