What is the difference between Lamarck and Darwin's theory of evolution?

Answer 1

Jean-Baptiste Lamarck proposed that organisms could pass on to their offspring traits that where acquired during their lifetime. This has come to be known as inheritance of acquired characteristics.

On the other hand Charles Darwin recognized the main mechanism for evolution: Natural Selection. Natural Selection is the process by which favorable heritable traits become more common in successive generations of a population and unfavorable heritable traits become less common, due to differential reproduction. That is: given a certain population, those individuals who are more fit to the selective pressure(s) by their habitat (in a given time and space) will leave more descendants than those less fit

In short, Lamarck thought that changes were acquired during the life of a parent organism and thentransmitted to their offspring while Darwin deducted that changes were already present in the parent organisms, and that the best adapted to that situation survived to breed, which meant that those genetic changes become common in the following generations.

Answer 2

In Darwin's theory, natural selection plays the key role. Organisms vary through random mutations--slight changes from their parents. The environment determines which are most likely to survive.

In Lamarck's theory, changes in phenotype are inherited. This is now known to be (largely) incorrect.

Answer 3

Both scientists believed that life changed gradually over a long period of time. However, Lamarck believed that changes in organisms were made by what they needed. For example, an elephant purposely stretching its trunk to reach food. Darwin, on the other hand, believed that changes in evolution had nothing to do with individual physical changes in an organism.

Answer 4

Jean-Baptiste Lamarck's thought that animals and plants adapted to their changing surroundings in their lifetime and then passed on these changes to their offspring. The classic example that he cited was a giraffe- he said that a giraffe's neck got longer as it stretched for leaves higher up on trees. This made its neck and bit longer, so its offspring had necks a bit longer too.

Darwin's theory of evolution is basically 'Survival of the Fittest" or "Natural selection." Genetic mutations occur in every species. Sometimes these are beneficial. For example a calf born more muscular than the rest will be more likely to mate and consequently pass on his genes to his offspring.

Answer 5

Darwin:

Evolution by natural selection

There are variations in a population and those single organisms that are more equipped to survive in their competitive environment will be more likely to survive and pass on those advantageous traits to their offspring, which over time leads to adaptations and evolution.

Lamarck:

If an organism works at something over its lifetime, what it has improved about itself will be passed on to the offspring

e.g. if your parents went to the gym everyday and got huge, you would be ripped too

Also, use and disuse, if an organism uses an organ/ body part more, it will be stronger

if an organism doesn't use something, it will weaken and eventually go away

we know this isn't true cuz otherwise we wouldn't still have appendixes

Obviously, Darwin was right

• 8 months ago

Answer 6

Basically, Lamarck proposed that anatomical changes occurred during the lifetime of an individual were passed on to its offspring. To use the giraffe as an example: Lamarck proposed that an individual giraffe grew a slightly longer neck, even though it had the same capacity for having a long neck at birth as its siblings, and then, when this variation proved successful, passed the variation onto its offspring.

Darwin, instead, proposed that changes were a matter of differential reproductive success: giraffes that were born (though some accidental mutation) with the capacity for longer necks had just a bit more chance to produce offspring than those who were born without that capacity.

Darwin, in effect, predicted the mechanism of genetics, and the way DNA passes on traits to offspring.

Answer 7

Most importantly, Lamarck thought that changes in inherited traits were acquired during life. For instance, he thought that the need of the parent to reach higher food sources would automatically lead to longer necks in the offspring of giraffes. Darwin first hypothesized that reproductive variation is mostly random, and that which drives adaptation is differential reproductive success.

Answer 8

Larmarck said that species acquired traits through their life and passed them on to their offspring (inheritance of acquired characteristics).

Darwin said that whole species adapts and characteristics with selective advantages were passed onto offspring through natural selection.

Answer 9

They are similar in a way that they have the same starting idea. That species are changing, and future generations are/can be benefiting, or at least being affected, by it.

Answer 10

in darwin theory there are different new theories like ....