What belief has made stem cell research controversial or problematic? harvesting adult stem cells is dangerous
Oscience should not cure diseases
O embryos are potential babies
many peoples lives have been helped by stem cell therapy

Cells a and b are the same size and shape, but cell a is metabolically quiet and cell b is actively consuming oxygen. oxygen will diffuse more quickly into cell because . b the oxygen molecules inside cell b have a higher kinetic energy b. a its membrane transport proteins will not be saturated c. a the diffusion gradient there is shallowerd. b the diffusion gradient there is steeper