A piece of DNA codes for a protein. Which of the following mutations is most likely to result in the smallest change in the protein for which piece of DNA codes? * a) Substitution of the first base in the sequence
b) Substitution of the third base in the sequence
c) Deletion of the first base in the sequence
d) Deletion of the third base in the sequence

Cpr, or cardiopulmonary resuscitation, is a first-aid technique to save lives. it involves compressions of the patient's chest cavity. which description is the best description of the functions of chest compressions in cpr? chest compressions are done to pump the heart. chest compressions are done to strengthen the rib bones. chest compressions increase carbon dioxide inhalation. chest compressions allow the patient's muscles to wake up.

What does polymerase chain reaction (pcr) do? o a. separates dna fragments by size o b. cuts a dna sample into fragments o c. provides an overall picture of a person's chromosomes o d. makes more copies of a sample of dna

Agroup of organisms that changes over time is said to