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Darwin And Lamarckian Theory Of Evolution

1248 words - 5 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.
Evolution can happen to any living organism, and is constantly happening. For a species to be “evolved” no major physical characteristics need to be changed, an evolutionary trait can be anything from changed certain cellular size or a drastic change such as the forming of a tail. Certain activities can affect a species long term also. For instance a fish that needs to escape a predator might jump out of the water, over melena of the species doing this they will develop a higher lung capacity.
There are many explanations for why this happens the two most known explanations are Darwin’s theory of evolution and Lamarck’s theory of evolution, Darwin’s theory of evolution focuses on natural selection and the idea traits in organism are constantly changing and that positive traits will outlast those with no traits or bad traits. Lamarckian evolution focuses on an organism being able to change its genetic makeup by repeatedly doing a certain action, once this has been done over many generations the latest generation will look different from the first.
Pleistocene Organism
The procoptodon was a kangaroo predecessor that lived in the Pleistocene era, the procoptodon had many adaptations, including; structural adaptations, such as its height. The procoptodon stood around two meters tall, had a short snout with a flat face and had two extra-long fingers on each paw as well as an extra-long toe shaped similar to a horse hoof on each foot these are speculated to have helped the procptodon to move through thick bush and gather leaves easier. Some hypothetical behavioural adaptations are that the procoptodon travelled with its mate and stayed with its young, this can supported by the groups of fossils found together. These adaptations allowed the procoptodon to roam the forests of its natural habitat with ease, the procoptodons habitat was within Australia. Fossils found to date have put the procoptodon around Queensland, New South Wales and South Australia. The diet of the procoptodon can only be speculated based on fossilised materials found with the procoptodons remains, gathered from this it is likely that the procoptodon had a diet of mainly leaves, shrubs and berries.
Modern Day Organism
The red kangaroo is a mammal currently living in Australia and a believed successor of the procpotodon. The red kangaroo has many adaptations to allow it to co-exist with its environment more efficiently, these include structural, behavioural and physiological...

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