Use the drop-down menus to complete the sentences. The supports and protects a plant cell. It gives the cell its rigid structure. Turgor pressure helps the plant stand upright. It is caused by the movement of into a plant cell. Plants are composed of cells that contain nuclei, which make them . Plants make their own food using sunlight, which makes them .

Is a  vector quantity  that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.