H2O is a substance that that is classified as a compound. It is the chemical formula of water. A compound is two or more elements that have been chemically combined. In this question, water has two elements which are hydrogen (H) and oxygen (O). Two hydrogen atoms combine with one oxygen atom to form a compound. The answer will thus be B.
False. Organs are one of the most complicated levels of organization in a living organism.
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Anastomosis is the term meaning sticking together two structures that are normally separated
<span>When a divergent boundary occurs under the ocean it is called oceanic ridge.</span>