The hormone calcitonin, which is produced by the parafollicular or C cells of the thyroid, has the opposite effect on blood calcium levels as does PTH. I hope this helps! : )
Well its most likely over hunted but if its endangered and not allowed to be hunted then it would be because of natural predators in the area being over populated and taking out the caribou to fast
The polarity of the water molecule helps it to cohere to nearby water molecules, forming a skin over it.
I believe b. Let me know if it's wrong
