The variation may already exist within the population, but often the variation comes from a mutation, or a random change in an organism's genes.
Red blood cells are responsible for the distribution of oxygen to other cells in the body.
Answer:
75 mL.
Explanation:
As you can see, displayed by the numbers and each tick mark going up the right side of the beaker, the blue fluid stops exactly halfway in between 50 and 100 mL. This equals 75 mL.
