Answer: b
Explanation: i got the answer wrong and i’m looking at the results rn
Answer:
Shape of Red Blood Cells Erythrocytes are biconcave discs with very shallow centers. This shape optimizes the ratio of surface area to volume, facilitating gas exchange. It also enables them to fold up as they move through narrow blood vessels.
It gives you a sign that digestion is having a hard time taking place.
Answer:
https://phys.org/news/2009-05-bird-songs-environment.html
Explanation:
Just search it up on Socratic app