Two alleles determine your blood type, one which comes from mother and another from father.
<span>Assuming that this is referring to the same list of options that was posted before with this question, it is the "sun" that is inexhaustible. Of course technically even the sun will burn out someday, but that won't happen for billions of years. </span>
Answer: Cells have different shapes because they do different things. Each cell type has its own role to play in helping our bodies to work properly. Their shapes help them carry out these roles effectively.
I hope this helped!
