Answer:
what is this for? A-level..?!
Explanation:
Explanation:
<h2>The three major branches of natural science are</h2><h2>1.Physical,the study of universe.</h2><h2>2.Chemistry,the study of matter.</h2><h2>3.Biology,the study of life and living or organisms.</h2><h2 /><h2>have a good day.</h2><h2>I hope this answer can help you</h2>
The answer is 4 million, there are about 9-10 million unique organic compounds that are known to exist