B. Carbon
Carbon is often called "The Element of Life" because it's found abundantly in all living and once living things
<h2>GAC</h2><h3>I'm assuming you're talking about DNA base pairs?</h3>
DNA helicases "unzip" the DNA molecule in preparation for replication; they break the hydrogen bonds between the two annealed nucleotide bases.
Species
It is the smallest and basic unit of classification. Taxonomic studies consider a group of individual organisms with fundamental similarities as a species.
