According to the cell theory, which structure contains cells?

The question is incomplete, the complete question is:

According to the cell theory, which structure contains cells? A)Blood B) Carbondioxide C) Water D) Chromosome

The correct answer is A (blood)

Explanation:

Blood is the liquid portion of human body and other organisms, it is made up of the plasma (liquid) and cells. These cells are red blood cells (RBC), white blood cells (WBC) and platelets.

The widely accepted scientific cell theory proposed by Theodor Schwann, Mathias Schleiden and Rudolf Virchow concludes that all living organisms are composed of small, basic units called CELLS. These cells are the building blocks of all living organisms.

Hence, if the cell theory proposed that cells are what makes up living organisms. Blood is the only option found in living organisms that is made up of cells (RBC, WBC etc). Chromosomes are found inside the cell.