Cell definition: the basic membrane-bound unit that contains the fundamental molecules of life and of which all living things are composed.
Cytology definition: the study of cells as fundamental units of living things.
I believe another term for Natural Selection, based off of the answers provided, I would say C, Survival of the Fittest.
Animals and plants need to get rid of carbon dioxide gas through a process called respiration. Carbon moves from fossil fuels to the atmosphere when fuels are burned. When humans burn fossil fuels to power factories, power plants, cars and trucks, most of the carbon quickly enters the atmosphere as carbon dioxide gas.
46 chromosomes, because they have the same amount of chromosomes as parent cells
They developed to be protected by the hard shell from parasites and ther predators.
