3. Description of which organelle betul "Creates a physical barrier ; Regulates the flow of materials into and out of the cell. Recognizes
chemical signals; Creates structure"
A. vacuoles
B. prokaryotic cells
C. cell membrane

Which statement best summarizes the importance of ernest rutherford’s gold foil experiment? it proved that all of john dalton’s postulates were true. it verified j. j. thomson’s work on the atomic structure. it showed that an electron circles a nucleus in a fixed-energy orbit. it showed that a nucleus occupies a small part of the whole atom.