Lamarck believed that traits acquired by one individual, will be immediately passed down on it's descendants. FE: If your father was a smith, you will have stronger muscles and bigger hands. Which is not true because evolution like that happens over thousands maybe millions of years and genetic changes are only expressed if the mutations occur in the DNA of the reproductivecells (spermproducingcells etc)
Note: Lamarck has proven to be right by scientist nowadays in the point of genetic expression: Children of people who survived the Hunger Winter in Holland of 1944 have more chance on heart diseases and become thicker more easily. This change is directed to the fact that certain events can activate certain genes, thus stating that Lamarck's theory isn't entirely wrong
Lamarck knew evolution was happening, his inaccuracies are in how he explained it. The first part of his theory is known as "use it or lose it" today. He said that use makes organs and structures bigger or more useful. Giraffes needed long necks, while blind cave fish lost their eyes. Darwin thought this idea was too simple, and replaced it with natural and sexual selection. The second major point Lamarck made was called acquired inherited traits. This means that traits that an organisms gets after it was born affects its offspring. This would mean that a bodybuilder would naturally get buff children, and that crabs that lost their claws would have clawless spawn. A famous experiment involving the mutilation of mice (which left their offspring unaffected) disproved this. Because of our knowledge of genetics, we say that variation is caused by mutations and not acquired traits.
Lamarck knew evolution was happening, his inaccuracies are in how he explained it. The first part of his theory is known as "use it or lose it" today. He said that use makes organs and structures bigger or more useful. Giraffes needed long necks, while blind cave fish lost their eyes. Darwin thought this idea was too simple, and replaced it with natural and sexual selection. The second major point Lamarck made was called acquired inherited traits. This means that traits that an organisms gets after it was born affects its offspring. This would mean that a bodybuilder would naturally get buff children, and that crabs that lost their claws would have clawless spawn. A famous experiment involving the mutilation of mice (which left their offspring unaffected) disproved this. Because of our knowledge of genetics, we say that variation is caused by mutations and not acquired traits.
He proposed that the biological process of adaptive change over time was driven by an internal desire or motivation within the organism to achieve a goal, e.g., long necks in giraffes. He also incorporated the concept of group selection into his version of evolution, which was later discredited by Darwinism. Individuals always die faster than groups so natural selection will always operate on the individual before the group. Darwinism and current gene centred evolutionary theory has also demonstrated that adaptive change over time is driven by the environment and chance.
Kimura (1968) • The vast majority of evolutionary changes at the molecular level are caused by random drift of selectively neutral mutants (not affecting fitness) ! The Molecular Clock.
There is no rate to evolution. Evolution is simply the following of natural selection within an environment. natural selection is like survival of the fittest. A mutation in the organism is caused which can start the natural selection process for that organism. If that organism is able to survive better with that mutation then the trait is passed down and slowly evolution takes place. The only way for evolution to happen at the same rate of another organism is if the organisms rely on each other and one goes through a change. The other dependent species will have to also go through an alteration in order to be able to survive. hope this helps!
Lamarck thought acquired traits were past on, but he was prover wrong by Darwin and his natural selection idea.
You can believe evolution was caused by God and he controls it.
Evolution
Evolution
Natural Selection is what Darwin believed was the cause of evolution.
Evolution is caused by adaptations (favorable traits) that sometimes come from mutations. Mutations happen by chance, and this is how chance plays a role in evolution.
It could be, if it is caused by genetically inherited factors.
convergence/homoplasy
The point of Evolution is that it doesn't start or stop at any given point. It's a natural process that happens throughout life. Evolution is caused by triggers in genes. Different animals have different triggers. These triggers can be caused by different things, but most commenly a change in habitat.
it is your face
sexual reproduction
sexual reproduction