[Solved] A small,flat surface used mostly on laptop computers over which users slide their finger to move the cursor is called a __________. A) trackball B) pointing stick C) touchpad D) mouse Visible Structure: The physical or organizational form of something as it appears to the naked eye. Organism's: Refers to any individual living entity, from single-celled microorganisms to plants and animals, including humans. Observable Characteristics: Traits or features that can be seen or measured directly. Phenotype: The set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.