A product or service for which people do not have to pay to consume or use is known as a good A.) Free-Rider B.) Externality C.) Private D.) Public

Hi! after fertilization occurs, the zygote goes through mitosis and then differentiation (aka specialization of cells) to have a variety of cells that perform different functions. this allows for the creation of tissues and so on, all of which were once stem cells with no specific function.i hope i !