In some places, one or more rock layers are missing in a sequence. for example, suppose you
find a sequence of five layers. you investigate the fossils in them and date some of the rocks.
you find that there seems to be a large gap between the time that layer 3 was deposited and
the time that layer 2 was deposited. this is called alan
conformation
confrontation
unconformity
conformity

cuz he's blad

explanation:

is this for the e2020 class

hey, i believe your answer would be d. sugar ribose and the base uracil. i believe this is the answer, because rna consists of sugar ribose, adenine, guanine, cytosine, and uracil.

your first option is incorrect, because that's dna. where it consists of sugar deoxyribose, adenine, guanine, cytosine and thymine.

your second option is also incorrect, this is because sugar deoxyribose is in dna, and uracil is in rna. these two do not make sense together.

your third option being incorrect, because sugar ribose is in rna, but not the base of thymine. rna consists of uracil, not thymine.

lastly your fourth option being correct! this answer is correct, because both sugar ribose, and the base uracil are in rna! ~

answer is d. sugar ribose and the base uracil.