Answer:
Pretty sure it's A because people can redo this test as many times as needed to verify the answer.
after break fast blood sugar low
(high blood sugar ) pancreas
pancreas (secretion of glucagon)
(secretion of insulin ) (glycogen breaks down to glucose)
intake of sugar by liver cells
Answer:
That hemoglobin is the substance that transports oxygen..
Primary growth . Plants grow taller by making sure all needs are met.