Both Lamarck and Darwin had excellent theories concerning evolution. In the case of Darwin, he believed that natural selection had the biggest impact on the evolution of a species. Darwin theorized each population had variations, these variations caused the individual to either have a greater or lesser chance of survival. The individual that had the disadvantaged genes would be less likely to live or reproduce and therefore be killed off by predators, or lack offspring. Those individuals with characteristics better suited for the environment had a higher likelihood to live and mate, therefore passing their genes on to the successive generation.
Lamarck held very different views on evolution, holding close the belief that if you don’t use it you lose it, commonly called use and disuse theory. The idea that the characteristics frequently utilized by the species will grow stronger and these strengths will be passed on to successive generations. Those traits that were used less would become progressively less pronounced, eventually disappearing completely if they are not needed. Lamarck also held the idea of acquired characteristics. The evolution of giraffes would be a common example of this theory. Lamarck theorized at one time all giraffes had the same length neck, therefore struggled to reach food from the tops of trees. He hypothesized that the giraffe stretched its neck so much during its lifetime that the neck eventually grew longer and th...
... middle of paper ...
...c gene responsible for the eye size and the size of taste buds has been responsible for the shrinkage of the eye and the enhancement of the olfactory senses.
Studying the eye loss in cave fish has numerous benefits to humans. On a rare occurrence humans are born with degenerative eye diseases. The genes responsible for the loss of eyes in the cave fish could be linked to the genes that cause eye diseases in humans. Further study may lead to a deeper understanding and therefore improved treatment of human eye diseases.
The cave fish has an interesting trade off of characteristics. Losing sight in an environment with little to no light is a give and take. The loss of sight has helped this species of fish gain an enhanced area of expertise. Bringing with it greater olfactory senses to better smell its food. If the fish cannot see its food it might as well smell it.
Need Writing Help?
Get feedback on grammar, clarity, concision and logic instantly.Check your paper »
- Jean Baptiste Lamarck (1744 - 1829) Jean Baptiste Lamarck was one of the first people to propose a theory of evolution to the public. Although his ideas were not widely accepted they paved the way for others to do work in that field. Even before his work on evolution he did extensive work with invertebrates. His work on invertebrates inevitably led him to his theory of evolution. This theory was not accepted at his time and has since been proven wrong. The way he was raised and the institutions he attended gave him the opportunity to perform his work.... [tags: Biographies Biography Lamarck Essays]
2811 words (8 pages)
- The definition of the term ‘evolution’ summarized into one sentence refers to the changes in genetic traits or mutation between several generations. This change in genetic traits usually occurs during the breeding process, where the genes are copied passed on to the offspring. As a result the mutation, the genetic variation would occur between individuals. The new character/s could transfer within the specie due to the horizontal transfer of gene and migration. As the genetic variation/s become common between the specie through ‘natural selection’ or random genetic drift effect, evolution occurred to this specie.... [tags: Evolution, Human, Human evolution, Charles Darwin]
1219 words (3.5 pages)
- Evolution is defined as “a theory that the differences between modern plants and animals are because of changes that happened by a natural process over a very long time” (Anonymous 2015). Whether you are an evolutionary biologist or a devout Christian, chances are you have heard of Charles Darwin and his theory of evolution by natural selection. Your opinion on the famous naturalist and his findings, however, will vary greatly depending on your background and beliefs. Charles Darwin, often referred to as “the father of evolution”, was born into a wealthy family; his father was a doctor (Young and Strode 2009).... [tags: Evolution, Charles Darwin, Natural selection]
1307 words (3.7 pages)
- Charles Darwin No one could have predicted the profound impact of Charles Darwin’s five-year trip aboard the HMS Beagle, and how his discoveries would change the lens through which we view the world. Not even Mr. Darwin himself was yet aware. As he studied the specimens of the creatures he brought back from this expedition, one question after another would propel him forward in developing his theory of evolution. But in the beginning, he could not grasp the implications of what he had discovered, and how it would change our perception of the origin of life on Earth.... [tags: Charles Darwin, Evolution, Charles Lyell]
1496 words (4.3 pages)
- How evolution happens Evolution is change.S Evolution is a certain species changing to become better adapted to their surroundings and in the end this modification causes this species to become a new breed altogether. There was no scientist that understood how evolution works until Charles Darwin and Alfred Russel Wallace (See figure 1) explained it to them. Lots of scientists had realised that plants and animals change with time, as palaeontologists could track the evolution of life in the fossil record.... [tags: Evolution, Natural selection, Charles Darwin]
1060 words (3 pages)
- Introduction Evolution is the idea of a living organism adapting or mutating to gain beneficial physiological, psychological and structural features. The genetic makeup of all living things is constantly changing, due to DNA replication errors or outside factors, some of these changes impact drastically on the organism changing it for the better or worse. Typically when an organisms genetic code is changed for the better and it reproduces and outlives its unchanged counterparts this process is called evolution.... [tags: Traits, Selection, Living Things]
1073 words (3.1 pages)
- Charles Darwin and Jean – Baptiste Lamarck are two of the earliest scientists known for their distinct concepts of evolution. Although both concepts aimed to explain the complexities of evolution, they each take a different approach. Darwin approached evolution through his views of natural selection, while Lamarck approached it through his model of acquired Characteristics. Darwin’s natural selection referred to survival of the fittest. In organisms, some variations are better adapted to their conditions of life than others, and, on average, the favorable ones are preserved while the others perish (Holmes.,1948).... [tags: Evolution, Biology, Species, Natural selection]
1206 words (3.4 pages)
- Darwin’s “dangerous” idea, a rather accurate descriptor of the theory. From the start, Charles Darwin’s theory regarding how species arise through natural selection has been met with resistance from a number of groups. Devoted Christians immediately rejected the idea that life had no grand creator designing species with a careful eye as it directly challenged their theory of creation and humankind’s importance. Darwin’s scientific peers also dismissed the idea as an underdeveloped hypothesis for Darwin was not able to explain the manner in which favorable traits were selected for.... [tags: Charles Darwin, Evolution, Natural selection]
1229 words (3.5 pages)
- Jean-Baptiste Lamarck, a French naturalist who lived from 1744 to 1829, set forth in his Philosophie Zoologique the idea that an organism’s form and inheritance are influenced by its circumstances (Philosophie Zoologique 1809). Lamarck’s theory of evolution, also known as Lamarckism, proposed [Lamarck’s theory of evolution, also known as Lamarckism, was based on the principle that an organism could pass acquired characteristics onto its offspring. (Futuyama 2013; Campbell and Reece 2005; Stansfield 2011).... [tags: DNA, Genetics, Epigenetics, Gene]
1679 words (4.8 pages)
- More than a century after his death, and four generations after the publication of his chief work, "The Origin of Species", Charles Darwin may still be considered the most controversial scientist in the world. His name is synonymous with the debate that continues to swirl around the theory of evolution, a theory that deeply shook the Western view of humanity and its place in the world. We tend to speak simply of the theory of evolution, leaving off the explanatory phrase, "through natural selection." At most, perhaps, the general public has heard of "survival of the fittest" a poor phrase as far as I'm concerned, since fitness in everyday usage is associated wit... [tags: Natural Selection, Evolution Essays]
1985 words (5.7 pages)