What balloons allowed scientists to study what for the first time

Types of scientific inquiry that biologist engage in that cannot be completely controlled

Blood stem cells may develop into any kind of human blood cells. what kind of stem cells are blood stem cells? a. multipotent stem cells o b. totipotent stem cells o c. pluripotent stem cells o d. unipotent stem cells

What type of graph presents information about how often certain or traits occur?