Answer:
B(affected by genes and the enviroment)
Explanation:
if you had gotten this from study island then that should be the right answer. i see that you put the actual question up but not the answers lol, hope this helps
Answer: stroke volume
Explanation:
Stroke volume is the amount of blood ejected during ventricular contraction or for each stroke of the heart.
Cell, Species, and Biosphere is my Answer hope it helps.
Nucleus organelle is the .....