Hypodermis is not a layer of the skin
When babies are born, their brains contain about a hundred billion of neurons. However, a few of these brain cells are connected. At age three, there are one thousand trillion connections formed. The brain starts to cut off unused connections at the age of eleven.
Answer:
Smoke-induced oxidative stress limited the oxygen-carrying capacity of the previous red blood cells
Explanation:
The red blood cell (RBC) contains hemoglobin which helps in the transport of oxygen. However, the Jane's smoking must have induced oxidative stress to the cells of her body including RBC, thus compromising it's oxygen-carrying capacity.
Hence Jane's body increased RBC count in order to maintain oxygen supply to all cells of her body.
I think b would fit more as the mitochondria, d would be the endoplasmic reticulum, and e would be lysosomes