Microfilaments differ from microtubules in that microfilaments
◦ are thicker than microtubules.
◦ help to anchor organelles, whereas microtubules primarily function to help cells change shape and move.
◦ are found only in plants, whereas microtubules are found in both plant and animal cells.
◦ are mainly composed of actin, whereas microtubules are composed of tubulin.