The cenancestor is defined as the last common ancestor of every currently living being. Its nature has been inferred from the identification of homologous genes between archaea, bacteria, and eukaryotic lineages. These inferences indicate that the cenancestor had a relatively modern protein translation system, similar in complexity to that of a current cell. However, the key enzymes for the replication of genetic material and for cell membrane biosynthesis are not homologous in bacteria, archaea, and eukaryotes. Here, we briefly review the history of the concept of the last universal common ancestor and the different hypotheses proposed for its biology.
With temperatures being so high this summer, mosquitoes (and their bites) are proliferating. But did you know that only the female mosquitoes bite? Why does this happen?
Many factors influence dispersal decisions in animals. However, animals only disperse once they are physically fit enough to reach and settle in the new location successfully.
The curious and primitive aspect of Triops is certainly noteworthy. In fact, it has been under consideration by zoologists for a long time. If we compared fossils with currently living members of the species, we would not be able to tell the difference. These fossils
The statement is false. Instead of answering the question, we are going to explain the falseness of the implicit premise in the question.
Question sent by NEREA MILÁN (València). JOAN MAYOL answers: In medicine, the pathological ingestion of soil or other inedible substances is called «pica», and it has been observed in many animal species, including elephants and humans. However, geophagy occurs in elephants in a natural and systematic way,
We have been aware from the 19th century of the importance of predation and rivalry between species in nature as predominant forces for natural selection. Darwinian thesis, the great paradigm of life, sets the basis for evolution in the mechanism of natural selection, without which,
Interview with Robin Dunbar, Evolutionary Antropology Professor at Oxford University, about the nature of the human being.