Why are cells necessary?

Answer 1

To improve our metabolism. If we were just one big bubble, we would never have enough place on our surface to exchange enough O2, CO2, and the like to be able to live. But if you calculate the surface of the millions of small cells, you'll get a multiple of the surface than that of the big bubble.
if we didnt have cells we wouldnt be alive. cells are a big part in out lives : )

Answer 2

Firstly, I assume this refers to multicellular organisms. Multicellular organisms use cells for several reasons; firstly, to increase surface area and thus the organism's durability and capability of intake and expulsion of materials. Moreover, cells are used to differentiate between functions of the organism through their placement in organs.

Answer 3

A cell is the basic unit of an organism. They are building blocks for tissues, organs, organ systems, and the complete organism. Further, the cell is where nutrients like glucose, and oxygen, are turned into energy and power at the cellular level, which then supports the entire organism.

Answer 4

Cells are necessary for life because they are the basic building blocks of all living organisms. They provide structure, function, and organization to living things. Cells are responsible for various processes such as energy production, growth, and reproduction.