[Solved] Talk about: -Hadrian's Pantheon 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.