Question

your body is made up of over 30 trillion cells. but you didnt start out that way humans begin as a single cell! that first cell grows and divides to form more cells. a human begins as a single fertilized egg cell known as a zygote. a teenage human is made of trillion cells. as the human body grows and develops, cells become specialized to do different things. these different types of cells are the building blocks of the organ systems that keep us alive. complete the paragraph. humans start out as a single cell. as humans develop, they form more cells. cells specialize to perform

Explanation:

The text describes human development starting from a single - celled zygote which divides to form more cells. As humans develop, cells divide to increase in number.

Answer:

form more