In a sample population of people 36% have recessive trait of "free" earlobe (q2). What is the frequency of the dominant allele for attached earlobes, p?

Carbon-14 has a half-life of 5,730 years and most igneous rock is older than that.

Mitochondria produce atp, a high energy compound. atp is used for all sorts of enzyme-mediated reactions, such as making proteins/nucleotides/etc, certain compounds cross the cell membrane, muscles move, etc.  without this source of energy, a cell will die. it will not be able to repair itself, defend against pathogens, etc.