Every organism from the smallest to the largest one follows the level of organization. The study of the different levels of organization of organisms helps in knowing the structure and function of the organisms. The sequence of the level of organization is cells – tissues - organs - organ systems –Organism. In the given question, in the box S is given an image of a cell. As per the level of organization, the cell is the lowest level of an organism because a cell is the structural and functional unit of life. Thus option D is correct.
Genes are made up of DNA.. DNA is the molecule that is the hereditary material in all living cells. The color of your hair,skin,eyes etc,, are all controlled in part by your genetic information
