C is the answer both a and b
1. The cells contain the same genes and express the same genes.
2. Multipotent (can differentiate to a limited number of cell fates/into a closely related family of cells).
3. Multipotent, totipotent, pluripotent (though I'm not 100% sure on this one).
4. Provide a source of cells for the body to replace certain types of cells that die.
There would be fewer days, less animals, less ways to survive, the ozone layer would expand, and pollution would take over.
