Which structures are found in both prokaryotic cells and eukaryotic cells?

choose all answers that are correct.

a.
cytoplasm

b.
flagella

c.
pili

d.
plasma membrane

e.
ribosomes

Which best describes the activation energy of a chemical reaction? a. the combined energy of all the reactants b. the amount of energy required for a reaction to occur c. the difference in energy between products and reactants d. the potential energy stored in the bonds of reactants and products