For the answer to the question above, oxygen makes it Redi would think it has to do with the amount of oxygen in the blood stream. So the answer is the third one, t<span>he presence of oxygen–bound hemoglobin makes it bright red.
I hope my answer helped you</span>
Not necessarily because cells them self don't actually contain cells
'Will you be able to trace the father of calves?'
In short, yes, you would be able to trace the father of calves.
Hope this helped!