Because after they turn into new cells the old one is simply turned into a different energy
Because animals take in a different form of “food”. Plants use sunlight as “food” and convert it to energy. Animals eat those plants, or other animals, in order to gain energy themselves.
In short, plants are producers, and animals are consumers.
Most bacteria rely on binary fission for propagation. Conceptually this is a simple process; a cell just needs to grow to twice its starting size and then split in two. But, to remain viable and competitive, a bacterium must divide at the right time, in the right place, and must provide each offspring with a complete copy of its essential genetic material. Bacterial cell division is studied in many research laboratories throughout the world. These investigations are uncovering the genetic mechanisms that regulate and drive bacterial cell division. Understanding the mechanics of this process is of great interest because it may allow for the design of new chemicals or novel antibiotics that specifically target and interfere with cell division in bacteria.
I think this might be the answer...