The DNA sequence of gene molecules show similarities and differences which can be used to determine species' relatedness.
After 10 min it is 60 kilometers from its destination
Answer:
Because they do not live in the extreme environments.
Explanation:
Cell membrane has a vital role in separating the external environment of cell from its external environment. Just like eukaryotic cell, cell membrane of bacteria is also composed of proteins and lipids (phospholipids).
If we compare the structure of ancient bacteria's and modern bacteria's cell membrane then we notice that in archaebacteria or ancient bacteria the phospholipids of cell membrane are linked with ether (means they have glycerol backbones). whereas in modern bacteria they are linked through ester linkages.
So, the stronger glycerol backbones give the archaebacteria more stable cell membranes through which they are able to resist harsh environmental stresses like salt lakes, volcanic stress, boiling mud and hot springs. As modern bacteria do not always have to live under such stresses thats why they donot have ether-linked cell membrane.
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Answer:
Both the pathways produce energy for the cell, where Glycolysis is the breakdown of a molecule of glucose to yield two molecules of pyruvate, whereas Kreb cycle is the process where acetyl CoA, produces citrate by adding its carbon acetyl group to oxaloacetate.
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