Biological organization starts with: A Cellular level B Organismic level C Atomic level D Submicroscopic molecular level

The smallest level in biological organization is the atomic level, which forms the base of all living systems. Atoms combine to create molecules, leading to progressively more complex structures such as macromolecules and organelles. Only at the cellular level does life itself become apparent, as cells represent the basic unit of life capable of independent function. Therefore, in hierarchical terms, biological organization begins at the atomic level before advancing through molecular structures and finally to cellular organization and beyond to tissues, organs, and complex organisms.

Thus, option C (Atomic level) is the correct answer, as it is the foundational level in biological systems where organization truly begins.