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The most recent common ancestor of all currently living organisms is the last universal ancestor, [3] which lived about 3.9 billion years ago. [ 5 ] [ 6 ] The two earliest pieces of evidence for life on Earth are graphite found to be biogenic in 3.7 billion-year-old metasedimentary rocks discovered in western Greenland [ 7 ] and microbial mat ...
The genomes of more than a thousand anonymous participants from a number of different ethnic groups were analyzed and made publicly available. EggNOG Database: a hierarchical, functionally and phylogenetically annotated orthology resource based on 5090 organisms and 2502 viruses. It provides multiple sequence alignments and maximum-likelihood ...
Evidence for the evolution of Homo sapiens from a common ancestor with chimpanzees is found in the number of chromosomes in humans as compared to all other members of Hominidae. All hominidae have 24 pairs of chromosomes, except humans, who have only 23 pairs. Human chromosome 2 is a result of an end-to-end fusion of two ancestral chromosomes.
Aphid giving birth to live young from an unfertilized egg. Heterogony is a form of facultative parthenogenesis where females alternate between sexual and asexual reproduction at regular intervals (see Alternation between sexual and asexual reproduction). Aphids are one group of organism
BioLib – Biological Library [6] BioLib is an international encyclopedia of plants, fungi and animals. X X X X X X X X X X Apart from taxonomic system you can visit the gallery, glossary, vernacular names dictionary, database of links and literature, systems of biotopes, discussion forum and several other functions related to biology
Reproduction (or procreation or breeding) is the biological process by which new individual organisms – "offspring" – are produced from their "parent" or parents. There are two forms of reproduction: asexual and sexual. In asexual reproduction, an organism can reproduce without the involvement of another organism.
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Genetic genealogy has enabled groups of people to trace their ancestry even though they are not able to use conventional genealogical techniques. This may be because they do not know one or both of their birth parents or because conventional genealogical records have been lost, destroyed or never existed.
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