Cyanobacteria > Red Algae > Green Algae > Land Plants
The endosymbiont theory is associated with mitochondria and chloroplasts. It proposes that these organelles originated from primitive prokaryotic cells that were engulfed by ancestral eukaryotic cells and formed a symbiotic relationship.
A primitive trait is a characteristic (if regarding to humans) of a human body/personality that has not developed. For example, toe nails (we keep them as a physical burden from our ancestors, Great Apes).
Primitive is something that is uncivilized or old and not up to date.
being the first or earliest of the kind or in existence, especially in an early age of the world: primitive forms of life. 2.early in the history of the world or of humankind. 3.characteristic of early ages or of an early state of human development: primitive toolmaking. 4.Anthropology . of or pertaining to a preliterate or tribal people having cultural or physical similarities with their early ancestors: no longer in technical use. 5.unaffected or little affected by civilizing influences; uncivilized; savage: primitive passions.
Mitochondria act like chloroplasts in plants as they both generate energy for the cell through cellular respiration and photosynthesis, respectively. Both organelles have their own DNA and ribosomes, supporting the endosymbiotic theory that mitochondria and chloroplasts were once free-living prokaryotic cells that were engulfed by a primitive eukaryotic cell.
they are the oldest ancestors
Heaven.
Primitive culture refers to a society that does not have development or sophistication for example a hunter-gather society. Non-primitive culture on the other hand is a society that has technological, cultural or economic development like the industrial capitalist society.
Both of them are thought to have originated from primitive bacteria. This theory is called Endosymbiont theory.
anthropologist
anthropologist
The endosymbiont theory is associated with mitochondria and chloroplasts. It proposes that these organelles originated from primitive prokaryotic cells that were engulfed by ancestral eukaryotic cells and formed a symbiotic relationship.
Mammals have gone through many stages of development since primitive times. There is one thing that primitive mammals and the mammals of today are not able to do without the help of in vitro, and that is to live in an external environment like those environments of reptile eggs.
The answer is long lost to prehistory; presumably when our primitive ancestors learned how to build and maintain a fire.
W. D. Hambly has written: 'Bibliography of African anthropology, 1937-1949' 'Tribal dancing and social development' -- subject(s): Society, Primitive, Music, Primitive, Folk dancing, Primitive Society, Primitive Music
Mammals have gone through many stages of development since primitive times. There is one thing that primitive mammals and the mammals of today are not able to do without the help of in vitro, and that is to live in an external environment like those environments of reptile eggs.
The four stages of culture development are: 1) Primitive culture, 2) Agricultural culture, 3) Industrial culture, and 4) Post-industrial culture. Each stage represents a different level of economic, social, and technological development within a society.