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Evolution Theories :star:, Lamarckism or impersonation](https://www…
Evolution Theories :star:
Darwinism or evolution by natural selection(
https://www.youtube.com/watch?v=sN_ALbAkvus
)
His postulate says that species evolve slowly by the action of natural selection.
Natural selection acts on the species and has beneficial relationships
the individuals of the same species there are differentiated characteristics or variations
Individuals who have more beneficial relationships survive and produce more offspring.
Examples:
Galapagos finches: the beaks of these birds were differentiated by food.
The color change of some moths, motivated by the industrial revolution in England.
Neo - Darwinism or synthetic theory of evolution(
https://www.youtube.com/watch?v=sfPHIQx_02U&t=3s
)
Produced by the changes present in the genetic composition of populations.
sexual reproduction increases variation because it generates new gene combinations,different individuals.
the adaptation to an environment is produced in the course of time and leaves as a result.
Examples:
the birch butterfly is the so-called industrial melanism. This Characteristic is defined as the predominant color.
shell evolution is explained according to phyletic gradualism. the sequence of species constitutes the same evolutionary line.
Lamarckism or impersonation](
https://www.youtube.com/watch?v=6AHuJ543gGs
)
of the enviroment induced modifications of the place where they live
Conditions of the enviroment change and generate new needs
The need creates the organism
The acquired modifications are transmitted to their offspring and favor the origin of a new species
Examples:
The elephant had to lengthen its trunk so that it could easily drink water and take baths.
a short-necked ancestor of a giraffe began feeding on leaves and trees. This streched his neck, a charcteristic that was inherited by the offspring
