The basic dichotomy of life
a. Cell: is a membrane-bounded module with a variety of distinct features,
including structures in which certain chemical reaction take place.
b. Prokaryotic Cells (Domains Bacteria and Archaea
Cells of the most primitive organisms have cells that lack a nucleus.
Monerans (bacteria and related organisms) are prokaryotes.
Prokaryotes also lack other membrane-bound internal structures.
c. Eukaryotic Cells
All organisms, other than monerans, have cells with nuclei.
Cells with nuclei = eukaryotic cells, and the organisms made of such cells
are eukaryotes.Eukaryotic cells have membrane-bound internal structures
(organelles) in addition to the nucleus.Endosymbiosis: for the origin of