Answer
(a) is the correct option
explanation :
Hair cells are the sensory receptors of both the sound related framework. hair cells distinguish development in their environment any damage in these hair cells can bring about the lowering hearing capability, and this defect is changeless. calcium ion is an imperative part of the hair cells to adjust the intensification of the signal.
White blood cells help to fight off infection and then begins to repair the wound. This would take about 2-5 days to start healing
He used Selective Breeding
I'm guessing Liver.
If it was in the stomach, we wouldn't get belly aches. If it were in the large intestine, we wouldn't poop. So that's my guess.
