xix.7. Conclusion
The lowest common element of life is a cell. Some cells function as independent entities, while others are a component of multicellular organisms. The same four major types of organic molecules—nucleic acids, proteins, carbohydrates, and lipids—make up every cell in the body.
As a result of early evolutionary processes, cells can also be divided into two main groups: prokaryotes, which have cytoplasmic genomes, and eukaryotes, which have nuclear-encased genomes and other membrane-bound organelles.
Cells have evolved into a huge diversity of forms and sizes despite their modest size. Together, they create the tissues that in turn create the organs and ultimately the entire organism.