Answer:
Speciation, it's the formation of a new organism in evolution
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 :)
I would say C! Most developing countries have high birth and death rates, while developed countries are more steady.
Enzymes are biological catalysts. Catalysts work by lowering the amount of energy required to set off a chemical reaction.