I think its B <span>DNA sequences that code for genetic instructions attach to phosphate groups that express an organism's physical traits. </span>
A eukaryotic cell is classified this way if it B. contains a nucleus. In biology the definition of eukaryotic is "having a true nucleus" which is how to depict a prokaryotic cell from a eukaryotic cell.
The beginning of the Eocene Epoch Era.
2) Cross-fertilization makes for more variation in the traits of plants, giving them immunities and resistances to weather, pests, and disease.
