The skin functions as a barrier to prevent the entry of microorganisms.
ATP, also called adenosine triphosphate or the body's energy currency, is a compound that is synthesized when we have a compound called adenosine diphosphate (ADP). When this compound gets another phosphate group (P) attached, we get the more known ATP. This is also why the name changes from diphosphate to triphosphate (di - two, tri - three).
Answer:
Prokaryotic cells don't have a membrane bound organelle
Explanation:
Prokaryotic cells has no nucleus as well as no membrane bound organelle. To remeber this, Pro rhymes with NO. Meaning NO nucleus NO membrane but it do have ribosomes,cytoplasm, and etc.
This is the answer if thats what you are reffering too.