Answer:
Red blood cells (erythrocytes)
Red blood cells carry oxygen from your lungs to your tissues. They also bring carbon dioxide back to your lungs. Red blood cells make up almost half of your blood. The lifespan of a red blood cell is around 120 days
Explanation:
I say the correct answer is C or B
MUTATIONS lead to duplications actually increase the number of genes in a genome.
All 3 of them explain the reason why people wear the mask to stop HIV