The correct option is D.
A natural law refers to a description of natural event that has been proved to be true without exception. Such a law usually generalizes a body of observation but can not explain why the observation occur. An example of a natural law is Newton's law of gravity, he observed that an object thrown up usually come down but can not explain the reason behind this observation.
Mathematically the it would be D
but scientifically since eventually food and resources will start becoming scarce it would be A then as the ecosystem recovers it goes back to D <span />
What elements are always present in protein?
A. radium, boron, fluorine, and chlorine
B. mercury, iron, lead, and aluminum
C. carbon, hydrogen, oxygen, and nitrogen ( ✔ )
D. neon, argon, krypton, and copper
<h2><u>Explanation</u> : </h2>
Proteins are one of the primary constituents of living matter. They consist of long chains of amino acids, which are bonded together by peptide linkages and thus called polypeptides. There are about 20 amino acids, and the atoms most prevalent in these are carbon, hydrogen, oxygen, nitrogen, and sulphur.
Answer:
A
Explanation:
An organic matter would be something made from a living organism and has carbon in it- if you look the only answer that would properly fit these criteria would be A: Sugar because it can be made from plants and it does include carbon.
Lungs, lung cells, lung tissues