What happens when electrons inside an atom get excited“?
A. They stay in their current energy
level
B. They jump down an energy level
and absorb energy in the process
C. They jump up an energy level and
release energy in the process

Which of the following is the best definition of a eukaryota? a. a one-celled organism that does not have a membrane-bound nucleus b. a one-celled organism that does not have a cell wall c. an organism whose cells each contain a membrane-bound nucleus d. an organism whose cells each have a cell wall