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The mediaeval great chain of being as a staircase, implying the possibility of progress: [1] Ramon Lull's Ladder of Ascent and Descent of the Mind, 1305. Alternatives to Darwinian evolution have been proposed by scholars investigating biology to explain signs of evolution and the relatedness of different groups of living things.
Objections to evolution have been raised since evolutionary ideas came to prominence in the 19th century. When Charles Darwin published his 1859 book On the Origin of Species, his theory of evolution (the idea that species arose through descent with modification from a single common ancestor in a process driven by natural selection) initially met opposition from scientists with different ...
Cell migration is a central process in the development and maintenance of multicellular organisms. Tissue formation during embryonic development , wound healing and immune responses all require the orchestrated movement of cells in particular directions to specific locations.
Zugunruhe is borrowed from German; it is a German compound word consisting of Zug, "move, migration," and unruhe (anxiety, restlessness). The word was first published in 1707, when it was used to describe the "inborn migratory urge" in captive migrants. [4]
"Diffusionism", in its original use in the 19th and early 20th centuries, did not preclude migration or invasion.It was rather the term for assumption of any spread of cultural innovation, including by migration or invasion, as opposed "evolutionism", assuming the independent appearance of cultural innovation in a process of parallel evolution, termed "cultural evolutionism".
A Wheel of Fortune contestant has gone viral for her "cheesesteak" blunder.. On the Monday, Dec. 30 episode, Gaelyn Nease from Tallahassee, Florida, appeared to be poised to win big as she faced ...
For example, cultured cells have been developed to create monoclonal antibodies; prior to this, production required animals to undergo a procedure likely to cause pain and distress. [7] However, even though cell or tissue culture methods may reduce the number of experiments performed on intact animals, the maintenance of cells in culture ...
Four doctors were killed at the Kamal Adwan Hospital in besieged northern Gaza on Friday, after Israeli forces stormed the compound, killing and injuring dozens of people in areas surrounding the ...