You can pick any organism and relate most of the cell theory to them. For instance, all living organisms are composed of cells. This is part of the cell theory and all living organisms are just that, made of cells. Another part of the cell theory that can be applied to any organism is that hereditary information is passed on from cell to cell. When we have Offspring, we pass off our hereditary information to our offspring. Lastly, part of the cell theory states that cells arise from pre-existing cells. I was born from a mother and a father so as a human I exist because I came from another human.
The stronger survived and the weaker passed on... Those with a weaker immune system had trouble with sickness and usually ended up passing on but those with strong immune systems were stronger and healthier and lived.
Mitosis is the result of things like skins cell. I alway remember this by my-toe-sis and you have skin on your toes. Meiosis sounds like me so what made you. Sex cell. You you were right. This is just the way that I rem we them.