Answer :
Final answer:
Different cells look different because certain genes are expressed. Gene expression is the activation of certain genes within a cell's DNA, which regulates cell functions and causes cells to have distinct appearances and functions. This is vital for the diversity of cell types in an organism.
Explanation:
Different cells look different because certain genes are expressed. Cellular differentiation is a process in biology where a cell changes from one cell type to another, usually by the process of gene expression. Gene expression involves the activation of certain genes within a cell's DNA, which causes the cell to produce specific proteins and thus, perform specific functions. For example, a heart cell expresses different genes than a brain cell, leading to their distinct appearances and functions. Differentiation and gene expression are vital to the diversity of cell types in an organism, contributing to the complex structure and function of the body.
Learn more about gene expression here:
https://brainly.com/question/33276216
#SPJ11