What system creates white blood cells?

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."

there are 35 white marbles

step-by-step explanation:

y- yellow marbles

4y + 5 = 45

subtract 5 from both sides

4y = 40

divide for from both sides

y = 10

plug in 10 to get 40 yellow marbles then subtract by 5 to get 35 marbles

thus there are only 10 yellow marbles

her next move would be to use agarose gel electrophoresis to separate the dna molecules of varying length and create a dna fingerprint.