B. Deer skins.
Why? Probably because back in the days Indians used to be extremely talented when it came to hunting for food, water, and even warmth. I doubt they'd have tools to spare besides bows and most likely rock knives they've hand made to cut down the bone and other stuff to make seasonings with. Building styles? No. Why would the Europeans ask Indians to trade building techniques? I doubt it. B is definitely the answer.
Answer: The main bonding in DNA which renders the double helix structure so stable is that of hydrogen bonds. ... As well as this there are hydrogen bonds between the bases and surrounding water molecules, and this combined with the even stronger phosphodiester bonds in the sugar phosphate backbone make DNA very stable.
Explanation:
Answer:
The answer is basically that having nerve cells reproduce can do more harm than good. Each nerve cell has a specific place in our nervous system. ... Adding new nerve cells would mess up these very specific connections in a very complex system.
cardiac, smooth, and skeletal
Hope this helps!
-Payshence xoxo