I believe that the answer to this question is energy!! because cells need energy and the reason they respire is for energy
D) oxygen, carbon dioxide when you breathe in, you take in oxygen and when you breath out, you release carbon dioxide.
This is a easy one! a promoter<span> is a region of DNA that initiates transcription of a particular gene. </span>Promoters<span> are located near the transcription start sites of genes, on the same strand and upstream on the DNA</span>
Answer:
Urinary tract infections.
For some people, especially older adults, the only sign of illness might be microscopic blood in the urine. Kidney infections (pyelonephritis). These can occur when bacteria enter your kidneys from your bloodstream or move from your ureters to your kidney(s)