Give reason:

(1) Cell differ in shape and size

Cells have different shape and size because different cell types have different functions. For example : Red blood cells are shaped like a doughnut to carry more hemoglobin, and to fit through small spaces, and neurons are long and skinny to span wide places to send signals around the body .

cancer   is   essentially   uncontrolled   mitosis   of specialized cells

answer; i believe that the correct answer is (lung);