The difference and similarity of prokaryotes and eukaryotes
The difference and similarity of prokaryotes and eukaryotes
Prokaryotes are called pre-nuclear, ancient organisms. They got their name because they did not have a cell nucleus. Eukaryotes are cells containing nuclei.
Prokaryotes are united in one kingdom - Drobyanki. Blue-green algae and bacteria also belong to this kingdom.
Prokaryotic cells are much less eukaryotic. Their size does not exceed, as a rule, 10 microns.
The annular DNA of the prokaryotes is located in the center of the cell and does not have an envelope. It is located in the cytoplasm. Eukaryotes, on the contrary, are stored in the nucleus of the nucleus, which is absent from their predecessors.
Eukaryotes and prokaryotes on the outside are coveredplasma membrane. In cells of prokaryotes there is no EPS - endoplasmic reticulum, plastids, metachondria, lysosomes and the Golgi complex. Functions of these membrane organelles are performed by mesosomes.
Eukaryotes, as a rule, are aerobes. They use oxygen in energy metabolism. Prokaryotes, on the contrary, are anaerobes and for them oxygen is harmful.
Prokaryotic cells reproduce asexuallyby way of. In other words, they are divided. Their DNA doubles and the cell divides in half in the transverse plane. Such cells can reproduce every 20 minutes, but this is only in favorable conditions, which can not be.
Also prokaryotes do not have a digestive vacuole, are not capable of mitosis and meiosis, and do not have gametes.
