Question

according to cell theory, scientists do not classify a virus as living because it does not have
a a membrane.
b genetic material.
c cellular structure.
d any organic molecules.

Explanation:

Cell theory states that all living organisms are composed of cells (basic structural units). Viruses lack cellular structures (e.g., cytoplasm, organelles) and can only replicate inside host cells. They may have membranes (option A) or genetic material (option B), and contain organic molecules (option D), but the key missing feature for classification as living under cell theory is cellular structure.

Answer:

C. cellular structure.