The color blindness would be from his mother, since it is located in the X chromosome, and since his father is not color blind, and he only has one X chromosome, it could not come from him, but since the trait is recessive in women (meaning that it is covered up by a capital X) it means his mother could have the trait in one of her chromosomes, but not the other. Unfortunately Bob got the short end of the stick and got the chromosome with color blindness, and since men only have one X chromosome, it is dominant in men, leaving Bob with color blindness.
The main difference between a prokaryotic and a eukaryotic cell is the absence of nucleus in the prokaryotic cell and its presence in the eukaryotic cell. The genetic material of the prokaryotic cell is not inside the membrane. On the contrary, the eukaryotic cell has genetic material inside the nucleus. Also, eukaryotes have linear chromosomes while prokaryotes have circular chromosomes.
Because it is needed in order for them to survive
3. is it would spin so fast around the earth that it would make 1 full rotation suck the Earth in.