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2 days ago · Placentalia. A mammal (from Latin mamma 'breast') [ 1] is a vertebrate animal of the class Mammalia ( / məˈmeɪli.ə / ). Mammals are characterized by the presence of milk -producing mammary glands for feeding their young, a neocortex region of the brain, fur or hair, and three middle ear bones.
4 days ago · The biological definition of species, which works for sexually reproducing organisms, is a group of actually or potentially interbreeding individuals. There are exceptions to this rule. Many species are similar enough that hybrid offspring are possible and may often occur in nature, but for the majority of species this rule generally holds.
1 day ago · Orangutans are great apes native to the rainforests of Indonesia and Malaysia. They are now found only in parts of Borneo and Sumatra, but during the Pleistocene they ranged throughout Southeast Asia and South China. Classified in the genus Pongo, orangutans were originally considered to be one species.
4 days ago · Human evolution is the evolutionary process within the history of primates that led to the emergence of Homo sapiens as a distinct species of the hominid family that includes all the great apes. [1]
2 days ago · Animals are multicellular eukaryotes whose cells are bound together by collagen. They have sperm and form polar bodies in oogenesis. Animals lack semirigid cell walls, and movement is effected through muscle and nerve cells. They usually gain energy from other organisms or their products.
1 day ago · The feat moved the species from a “critically endangered" classification to “endangered" and, Fritz says, is the first attempt to reintroduce a continentally extinct migratory bird species.
2 days ago · 5 fun facts about evolution. The last common ancestor of all life on Earth is estimated to have existed around 4.2 billion years ago.; There are three ingredients necessary for natural selection ...
