The reason why taq polymerase is used is because it is thermostable, meaning that it can remain intact and reactive after being exposed to the cycles of high temperatures that are used in PCR (an upwards of 94 degrees Celsius). If human DNA polymerase were used instead, it would immediately unfold and become inactive after the first round of high temperatures, effectively ceasing the PCR.
Well, both tend to feed on already decaying things, so I'd say that the body is at least 20 to 50 days after death. Beetles normally take over around that time because maggots can no longer get through the dry tissue.
C. The shape of a protein allows it to perform several different jobs.
Homeostasis is the equilibrium of a cell.
Autotrophs make their own food through photosynthesis.
Mitochondria undergoes cellular respiration and is often referred to as the "powerhouse of the cell".
