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Mar 19, 640
Greek evolutionary thoughts
first animals lived in water, during a wet phase of the Earth's past, and that the first land-dwelling ancestors of mankind must have been born in water, and only spent part of their life on land -
Mar 19, 700
Chinese thoughts on evolutionary thoughts
denies the fixity of biological species and Taoist philosophers speculated that species had developed differing attributes in response to differing environments -
Period: Jan 1, 1100 to
Divine origin
life was created by God during a single week -
Mar 19, 1500
Panspermia Theory
means seeds everywhere. It suggests that life could have
existed on another planet and moved to Earth by meteorites, comets etc -
Chemical evolution theory
living organisms that appeared on Earth arose
from inorganic matter in a time when the chemical environment and conditions of the
planet were very different from today’s conditions. -
Period: to
Lamarks life period
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Lamarck theory of evolution
Lamarck believed that the modifications an organism acquires during its
lifetime are passed to its offspring (inheritance of acquired characteristics) -
Spontaneous generation
simple living organisms could come into being by spontaneous generation, this means that they could come from dust, mud, etc -
James Ussher and Charles Lightfoot
Usher fixed the date of creation at October 23, 4004 B.C; Dr. Charles Lightfoot of Cambridge University in England proclaimed that the time of creation was 9:00 A.M. on October 23, 4004 B.C. -
Period: to
Darwins life period
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Darwins theory of natural selection
theory of natural selection:
Survival in the struggle for existence is not random, but depends
in part on the hereditary constitution of the surviving individuals. Those individuals
whose inherited characteristics fit them best to their environment are likely to leave
more offspring than less fit individuals. -
Period: to
Spontaneous generation
Paris Academy of Sciences offered a prize for
any experiments that would help resolve the conflict on spontaneous generation. 1864 by
Louis Pasteur, as he published the results of an experiment where he proved that
microorganisms did not arise by spontaneous generation -
TODAY’S THEORY OF EVOLUTION
modern synthesis or neo-Darwinism:
the natural selection (which is seen through differential reproduction), that acts upon genetic variations (which are the outcome of mutations or sexual recombination) which appear among the members of a population.
