Histologists studies groups of cells that work together to form a particular function. Histologists must focus their attention on the ___ level of organization. A) cellularB) tissueC) chemicalD) organE) physiological

B) tissue

Explanation:

The evolution of life on Earth shows that life originated when a structure which contained all the molecules called molecules of life with suitable conditions to survive was formed. The structure was surrounded by the plasma membrane and is known as the cell.

During the evolution of cells, the cells aggregated together to perform a higher and complex function which happened when the group of the cell was programmed to perform the same function called tissue. Thus, the tissue is the level of organization which can perform a particular function by a group of cells.

Thus, the tissue is the correct answer.