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Americo-Liberian people (also known as Congo people or Congau people), [2] are a Liberian ethnic group of African American, Afro-Caribbean, and liberated African origin. Americo-Liberians trace their ancestry to free-born and formerly enslaved African Americans who emigrated in the 19th century to become the founders of the state of Liberia.
Evidence of common descent of living organisms has been discovered by scientists researching in a variety of disciplines over many decades, demonstrating that all life on Earth comes from a single ancestor. This forms an important part of the evidence on which evolutionary theory rests, demonstrates that evolution does occur, and illustrates ...
Last universal common ancestor. The last universal common ancestor (LUCA) is the hypothesized common ancestral cell from which the three domains of life, the Bacteria, the Archaea, and the Eukarya originated. The cell had a lipid bilayer; it possessed the genetic code and ribosomes which translated from DNA or RNA to proteins.
A life form (also spelled life-form or lifeform) is an entity that is living, [1] [2] such as plants , animals , and fungi . It is estimated that more than 99% of all species that ever existed on Earth, amounting to over five billion species, [3] are extinct. [4] [5] Earth is the only celestial body known to harbor life forms. No form of ...
The libero is, generally, the most skilled defensive player on the team. There is also a libero tracking sheet, where the referees or officiating team must keep track of whom the libero subs in and out for. Under FIVB rules, a libero is not allowed to serve. By contrast, a libero can serve in NCAA volleyball, but only in a specific rotation.
Evolutionary biology is the subfield of biology that studies the evolutionary processes (natural selection, common descent, speciation) that produced the diversity of life on Earth. It is also defined as the study of the history of life forms on Earth. Evolution holds that all species are related and gradually change over generations. [1]
Great Filter. The Great Filter is the idea that, in the development of life from the earliest stages of abiogenesis to reaching the highest levels of development on the Kardashev scale, there is a barrier to development that makes detectable extraterrestrial life exceedingly rare. [1][2] The Great Filter is one possible resolution of the Fermi ...
Macroevolution comprises the evolutionary processes and patterns which occur at and above the species level. [1][2][3] In contrast, microevolution is evolution occurring within the population (s) of a single species. In other words, microevolution is the scale of evolution that is limited to intraspecific (within-species) variation, while ...