Why are many fossil remains left from the last ice age

What problem would a person have if the nucleic acid in one of his or her cells were damaged?

The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false

In vapor-liquid equilibrium in a binary mixture, both components are generally present in both phases. how many degrees of freedom are there for such a system? the reaction between nitrogen and hydrogen to form ammonia occurs in the gas phase. how many degrees of freedom are there for this system? steam and coal react at high temperatures to form hydrogen, carbon monoxide, carbon dioxide, and methane. the following reactions have been suggested as being involved in the chemical transformation: