Theories evolutionary

Opposition to the idea that changes in the agencies follow a
unique address from the imperfect towards the perfect conceived the
Lamark scale proposed a classification system for graft.
Considers that the scale animal begins with a minimum of two branches
independent and along its route exists some
ramifications that seem to bring an end is specific sites
. To explain the cause of change and the emergence of new
adjustments outlined two laws of nature.
Jean-Baptiste Monet, knight of Lamark. He belonged to the generation
lighting of the late eighteenth century and the beginning of the century, was
Some naturalists French first explain the origin of the
species diversity:
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The principle of use and disuse: The use and more frequent
Continued strengthens the body, develops and grows gradually
that body and it provides more strength. While the disused
any permanent body weakens and deteriorates the
imperceptibly and gradually diminish their functional ability to
which ultimately disappears.
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Legacy of the characters acquired: All acquisitions or
losses recorded by nature individuals are preserved
by playing in the new born individuals who provided
when the changes are acquired common for both sexes, or
at least for the individual who produces offspring.
Lamark believed that the bodies were located in more simple to base
the classification because it is generated spontaneously. Likewise
believed that the spontaneous generation was a continuing mechanism that
restored in the wild lifestyle easier, not because of
these agencies exist this process simple and would not be exhausted
"raw material" for subsequent processing.
He suggested that species diversity originates as a result
of the needs posed by the environment in which they live organisms,
that is, changes occur due to the need for
organisms to adapt to the environment. The adaptations of species
are answers to these needs.
The use of an organ or structure reinforces what the change in the disused
leads to their disappearance or atrophy.
Lamark's ideas are considered bad and have been overcome.

In other words:
Jean-Baptiste Lamarck (1744-1829), French biologist and zoologist
specializes in invertebrates made an early theories
of developments.
Lamarck was born in Bazentin-le-Petit and attended a Jesuit school in
Amiens, where he received a classical education until 1759. That year he died
his father, and Lamarck joined the army and began studying the
plants. In 1768 he left the military life and studied medicine in Paris
for four years. During this period began to take an interest in the
meteorology and chemistry. At the same time, wrote a paper on
its botanical observations, the naturalist Georges Buffon Louis
published in 1779 under the name Flore franis (Flora French). As
One result of the publication of books and his friendship with Buffon, Lamarck
was elected member of the Academy of Sciences. He became
Contributor botanist in 1783, but made his most important job
when he started working in the Jardin du Roi in 1788. After his
reorganization in 1793, Lamarck's ideas helped to define the
structure of the new Museum of Natural History. Ironically
this reorganization meant displacement of Lamarck
botany department and his appointment as professor of area
insects and worms, that section himself baptized as a department
invertebrate zoology.
While his contribution includes work on science
meteorology, botany, chemistry, paleontology geology is
especially known for his studies of zoology
invertebrates and for his theory on evolution. He published a
impressive work in seven volumes, Natural history of animals
invertebrates, (1815-1822).
The comments regarding Lamarck theoretical developments,
known in the early nineteenth century under the name
PROCESSING or transmutation, preceded his extensive work
research on invertebrates. Like other naturalists,
which included Georges Cuvier and Geoffroy Saint-Hilaire,
Lamarck defended the viewpoint according to which, in nature,
animals were organized according to a scala naturae (scale
naturally), seamless. According to Lamarck, once the
nature created life, the subsequent life forms were
result of the action of time and environment on the
organization of organic beings. From lifestyles more
simple, naturally arise from other more complex. Lamarck
presented these ideas for the first time in his major theoretical work,
Philosophy zoological, (1809), but then prepare for the
Throughout his career. It included the final version of this hypothesis in
her work in several volumes on invertebrates. It Lamarck
explains that his marche de la nature (scale) is governed by
Biological three laws: the influence of the environment on the
development of organs, the change in structure-based body
in the use or non-use of different parts of the body, and
inheritance of acquired characteristics. However, Lamarck never explained
clearly reasoned manner consistent nor their views, hence their
ideas were never taken seriously during his lifetime. His theory
developments suffered major setbacks at the hands of Cuvier,
defending their own ideas from a position much more scientific
solid. Lamarck died without excessive appreciation towards their scientific
ideas that were not reassessed vigorously until the second half of
nineteenth century in which he acknowledged as a deep thinker and advanced to
his time.