What is the definition of matter? what is matter?

Dna is colied into chromosomes in a cell

Adigestive system that is a series of tubes beginning at the mouth and ending at the anus is a digestive system.

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