1. are unicellular organisms that lack a nucleus 2. A second membrane, called the , is found outside the wall in some bacteria.

3. are the most rare of the two different domains of prokaryotes, and are found primarily is harsh conditions.

4. The protective structure that a prokaryote may form when conditions are unfavorable is called an

5. Bacterial growth can be slowed or blocked using medications called .

6. Bacteria can connect and exchange pieces of DNA, called plasmids, through a process known as .

is in the form atp or adenosine triphosphate

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.