Answer:
Yes you are correct, they are
Explanation:
natural resources are only to be found on earth, they are natural
<span>Because by the time it burns it self out, in a couple billion years, it won't matter. The fact that it will destroy the earth at this point also makes it not matter</span>
Isotopes are elements with same atomic number Z= number of protons but different mass number A, where A= Z+N, N= number of neutrons which is variable. As for radioisotopes, I’ve never heard of them before !
Answer:
organism, organ system, organ, tissue, cell
Explanation:
The main function of the respiratory system is to allow the exchange of gases between the atmosphere and the lungs.
Hence,the only structure that carries out this function is the alveoli as other structures such as the nose,trachea and pharynx transport gases to the alveoli just so that it can can out its function.
