Answer:
<u><em>Digestion</em></u>
Explanation:
Hope this helps:)
<span>It is important to have an instructor when you start a weight training program because they will assess you to you daily routine. The instructors will help you lose or gain weight by giving you schedule of works and plans for your food. They are important because they are expert on how you could adopt to the change of your daily routines.</span>
If the cell membrane did not allow nutrients to pass through, the nucleus would be unable to send out instructions. Additionally, the mitochondria is the powerhouse of the cell.
