A chiropractor. you might've heard about them 'cracking your back' professionally
Vary in the number of neutrons but Sama in the number if protons are called isotopes
I believe the answer is fish vertebrates. i hope this helped
anwser:
A
Explanation:
calibrated to test and see if the temperature correctly
Answer:
A) the envelope of gases surrounding the Earth the envelope of gases surrounding the Earth
Explanation: A biosphere is layers of gas surrounding earth's atmosphere, the envelope of gases surrounding the Earth is the closest thing to that description.