Smooth endoplasmic reticulum has vacuoles attached to its surface. Smooth endoplasmic reticulum has vacuoles attached to its surface. Rough endoplasmic reticulum has ribosomes attached to its surface. Rough endoplasmic reticulum has ribosomes attached to its surface. Smooth endoplasmic reticulum has ribosomes attached to its surface.
That statement is incorrect. Smooth endoplasmic reticulum does not have ribosomes attached to its surface. It is called "smooth" because it lacks the ribosomes that are found on the surface of rough endoplasmic reticulum.
