Evolution theories
Darwinism its says that the species changes over time, give rise to new species and they share a common ancestor. and that the strongest survives or the one that adapts to the ecosystem. or else they die.
marckismThe species transform because of the enviroment induced modifications of the place where they live.Transmited to their decendendets.and it also says the need creates the organism.
Neo-Darwinism Are processes are produced by the changes present in the genetic composition of population
Caracteristic
2.The most used developp more and the lest used atrophy or can even disapper.
3.They acquiered modifications are transmited to their and favor the origin of a new species
1.Conditions of the enviroment change and generat new need in the individuals.
Example
The trunk of the elephants was modified by long and difficult times of drought and that helped it access the water, so that little by little its trunk evolved until the specimen that we know today.
Evolution explain the transformation that species and there are 3 theories that are.
Caracteristics
2 The fight for survival
3 Survival of the most apt
1 Between individuals of the same species there are differentiated characteristic or variations that are inherited.
4The natural selection acts over the species and has beneficial variations
Example
The change in color of a chameleon when it has a prey, or to protect it self.
The reaction of bacteria to the medicine when they constantly use it
Characteristics
Natural selection acts over certain individuals so that they have more possibilities of producing offspring.
Produced in the course of time and leaves as a result a ´population preparated to survive the enviroment.
Sexual production increases variation.
The speciation is a mechanism of formation of new species are 3.
These are inhered changes produced in the genetic materialand give place a diferation individuals.
Example
the birch butterfly that grows dark in urban areas. this process is called industrial melanism
The ancestor of the horse did not have a hoof among other things and is smaller
mule