Why are eukaryotic system so complex as compared to bacteria or prokaryotes?
Table of Contents
- 1 Why are eukaryotic system so complex as compared to bacteria or prokaryotes?
- 2 What evidence supports the idea that archaea are more closely related to eukaryotes than to bacteria?
- 3 What makes bacteria different from archaea and eukaryotes?
- 4 Why are bacteria different from eukaryotes?
- 5 Are Bacteria and Archaea closely related?
- 6 Why are archaea placed in their own domain of life even though they have only been known to science since the 1970’s?
- 7 What is the difference between archaea and bacteria?
- 8 How is glycerol different in eukaryotes and archaea?
Why are eukaryotic system so complex as compared to bacteria or prokaryotes?
One theory that may explain how eukaryotes became so complex is the endosymbiotic theory. This theory proposes that organelles like mitochondria and chloroplasts were once free-living prokaryotic cells that began to live within a larger host cell.
The evidence of the close relationship between the Archaea and the Eukarya came when scientists analyzed the nucleotide sequences of molecules called ribosomal RNA (rRNA). All organisms tested from Eukarya and Archaea had a particular sequence in common, and none of those tested from Bacteria had this sequence.
Why do some scientists consider archaea to be more closely related to eukaryotes than prokaryotes?
Despite this visual similarity to bacteria, archaea possess genes and several metabolic pathways that are more closely-related to those of eukaryotes, notably the enzymes involved in transcription and translation. Archaea exhibit a great variety of chemical reactions in their metabolism and use many sources of energy.
Why are bacteria in general capable of evolving more than eukaryotes?
So those kinds of structures you can make regardless of whether you are a bacterium or a eukaryote and regardless of the presence of nucleators or motors.
What makes bacteria different from archaea and eukaryotes?
Archaea and bacterial cells lack organelles or other internal membrane-bound structures. Therefore, unlike eukaryotes, archaea and bacteria do not have a nucleus separating their genetic material from the rest of the cell. In contrast, some eukaryotes do have cell walls, while others do not.
Why are bacteria different from eukaryotes?
The most obvious difference between eukaryotes and bacteria is that there is a membrane-bounded nucleus in eukaryotes and not in bacteria – again, for the most part: there is a bacterium with the wonderful name Gemmata obscuriglobus that is described as having a double membrane enclosing the DNA in a nucleus-like …
What is the relationship between bacteria archaea and Eukarya?
Both Bacteria and Archaea are prokaryotes, single-celled microorganisms with no nuclei, and Eukarya includes us and all other animals, plants, fungi, and single-celled protists – all organisms whose cells have nuclei to enclose their DNA apart from the rest of the cell.
How are Bacteria and Archaea similar?
Similarities Between Them Archaea and bacteria are both prokaryotes, meaning they do not have a nucleus and lack membrane-bound organelles. Both archaea and bacteria have flagella, thread-like structures that allow organisms to move by propelling them through their environment.
These relationships indicate that archaea are more closely related to eukaryotes than to bacteria, even though superficially archaea appear to be much more similar to bacteria than eukaryotes.
Why are archaea placed in their own domain of life even though they have only been known to science since the 1970’s?
Why are archaea placed in their own domain of life, even though they have only been known to science since the 1970’s. They originally were thought to be of the kingdom bacteria but because they have many of the same attributes of both kingdoms bacteria and eukarya, they have their own group.
In which ways are bacteria more diverse than eukaryotes?
From BioMineWiki
| Prokaryotic cell | Eukaryotic cell | |
|---|---|---|
| Domain | Bacteria | Eukarya |
| Diversity | Prokaryotes are more diverse than eukaryotes | |
| Complexity | Prokaryotes are less complex than eukaryotes | |
| Genetic variation mechanisms | Asexual. Produce clones. May transfer genetic material horizontally. | Sexual recombination |
How are archaea and bacteria alike and different?
Similar to bacteria, archaea do not have interior membranes but both have a cell wall and use flagella to swim. Archaea differ in the fact that their cell wall does not contain peptidoglycan and cell membrane uses ether linked lipids as opposed to ester linked lipids in bacteria.
What is the difference between archaea and bacteria?
Now we are certain that Archaea possess distinct difference from true bacteria in their cellular structures and metabolic activities, and also they have a unique and separate evolutionary ancestry. Archaea shows some characters similar to true bacteria where as some unique sets of characters they share between eukaryotes.
How is glycerol different in eukaryotes and archaea?
In archaea it is in the L-isomeric form, while bacteria and eukaryotes have the D-isomeric form. A second difference is the presence of an ether-linkage between the glycerol and the side chain, as opposed to the ester-linked lipids found in bacteria and eukaryotes. The ether-linkage provides more chemical stability to the membrane.
What Kingdom does archaea belong to?
Eubacteria (Bacteria) and (3). Eukarya or Eukaryota. In the earlier systems of classifications, Archaea were treated as a unique type of bacteria called Archaebacteria and they were included in the Kingdom Monera along with true bacteria and Cyanobacteria…
Why do archaea have ribosomes 70S in size?
While archaea have ribosomes that are 70S in size, the same as bacteria, it was the rRNA nucleotide differences that provided scientists with the conclusive evidence to argue that archaea deserved a domain separate from the bacteria.