Bc you're their owner and you bring them joy so they missed you. :3
<span>Observing that fibroblasts grew better in cell culture when blood serum was added to the growth medium instead of blood plasma. Thus proving that there was a substance in serum that made it easier for fibroblasts to grow.</span>
Answer:
Osteoblasts. is the answer
<span>Cytosis requires energy, and the production of energy depends on oxygen. Diffusion does not require energy.</span>
B is the correct energy because carbs contain lots of energy
