Why are all the different parts of the cell necessary

The correct answer would be - every part of the cell has a specific function in order to make the body properly work.

Explanation:

The cell is the building block that is called a biological and fundamental unit of the body. The cell has cytoplasm enclosed by the plasma membrane that acts as a barrier that allows specific molecules to pass in or out. The cytoplasm has many cells organelle with specific functions.

For example, the mitochondrion is an organelle of the cell that acts as a power house as it provides the body energy in the form of ATP. Another example is the golgi apparatus that modify and package the protein so it can move from the target site with the help of vesicles.

Thus, the correct answer is - every part of the cell has a specific function in order to make the body properly work.

a "theory" a suggestion that is not 100 % accurate, or a figure. some people say its a theory because they of all the passed theory's about one subject. it depends sometimes theory might be accurate and sometimes they are.

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;