The Nucleus is the hub of the cell, the heart and soul of the cell. As much as a quarterback is in a football team. The Nucleus is what keeps the cell going and a cell wouldn't exist without a Nucleus. Hope this helped, have an amazing day :)
Answer:
A process called cellular respiration, chemical energy in food is converted into chemical energy that the cell can use, and stores it in molecules of ATP. When the cell needs energy to do work, ATP loses its 3rd phosphate group, releasing energy stored in the bond that the cell can use to do work.
Explanation:
I actually found this perfect example on the internet. Its the first part to your question.
"The red blood cell<span> survives on average only 120 days. </span>Red cells<span> contain a special protein called hemoglobin, which helps carry oxygen from the lungs to the rest of the </span>body<span> and then returns carbon dioxide from the </span>body<span> to the lungs so it can be exhaled." - hematology.org</span>
They can create competition within a certain niche
