What makes mitochondrial dna useful as a molecular clock?
a. it is only found in select organisms, making it easier to compare relationships between species that have it.
b. a large portion of dna ring is not vital to structure or function allowing it to accumulate neutral mutations.
c. it's rate of mutation increases over time as organisms continue to evolve and differentiate from each other
d. a slow mutation rate makes it useful for determining evolutionary relationships between ancient species

If these are the missing choices: a. to determine skin temperature, place the back of your hand against the patient's skin.b. determine body temperature by touching the patient's hands and feet.c. skin temperature will tell you very little about this patient's condition or well-being.d. the patient's skin temperature and color will likely be warm and red.my answer is: a. to determine skin temperature, place the back of your hand against the patient's skin. using the back of the hand to check for temperature rather than the palm is more effective because the back of the hand has more nerves that can feel and transmit the temperature than the palm.