Which factor within a population could be studied to determine whether the population is evolving? a. reproduction method b. age of individuals c. allele frequency d. number of individuals

Hydrogen has only one electron in its only (and outer) electron shell. if a hydrogen atom were to absorb a small amount of energy, where would bohr say the electron would go? a. fly off the atom b. nowhere, it would just speed up. c. spiral inwards towards the nucleus d. move up to another shell that would form