Answer:
Substance
<u>Review</u>:
⇒ One of a class of substances that cannot be separated into simpler substances by chemical means.
<u>Compound</u>:
⇒ A pure substance composed of two or more elements who composition is constant.
All carbohydrates, including sugar, therefore contain the same three elements:carbon<span>, </span>hydrogen<span> and </span>oxygen<span>.</span>
Thomas could maybe look back through his day and see where he put them
Answer:
The Miller-Urey experiments essential to the theory of evolution because they showed how organic molecules could be made from Earth's early atmosphere.
Explanation:
