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Transcript
1. The evolution of the peppered moth described is one of among the simple and very good examples that provide a very clear and easy to understand explanation of what is meant by natural selection. Such example of natural selection can be easily understood by any lay person or even young children. Along with the natural selection, the pepper moth evolution also points out the camouflage as one of the pressures of the natural selection. The color darkening of the peppered moth was actually a response to pollutants which was termed as industrial melanism as the color darkening was from the loots as industrial by-products. 2. The evolution of the Galapagos Penguins demonstrates how animals are subject to the pressures of natural selection. The Galapagos penguins evolved to have many differences as compared to the body shapes, characteristics, behavior, and adaptations of the Penguins from the Antarctic. The Galapagos Penguin evolution provides a very good example that point out the role of environmental pressures on the evolution of certain animal species which are pushed to undergo the natural selection process. I think the smaller bodies and less fat on the bodies of the Galapagos Penguins are mainly caused by less food to eat and of course for the species to adapt to warmer weather such body changes provide great advantage and the best advantage is making their survival possible in such a very different environment. 3. Galapagos finches which entered the Galapagos Islands evolved unique species in every island. The finches came into the island because of the unique opportunities. As every island in Galapagos have differing unfilled niches providing varying evolutionary pressures, evolution of different finches evolved Adaptation based on availability of foods greatly affects the evolution of the beaks. When foods available in the environment became scarce, most foods available were larger in size which caused the development of larger beaks of some finches evolving into a different species. The evolution of the finches was rapid and filled the island with different species in short time. The spread of the different finch species in Galapagos provides a good explanation of adaptive radiation as natural selection. 4. Fossils provide very good information that explains the evolutionary changes that took place particularly on the earlier periods dating back even to the time before the known human existence. The evolution of the different animas such birds as studied according to fossils will not only provide information about the natural selection but also helps to trace back the ancestors of certain species. The actual effects of natural selection are currently observable but information on what really occurred during the past is best provided by studying the fossils. Studying the natural selection that occurred in birds through the study of fossils is very interesting. 5. Evolution by natural selection through the study of fossils is truly amazing allows to study the amazing events that could take place billion of years ago. The modernizing society has found many other factors to be studied that can provide information about the evolution of certain species. However, fossils which could had occurred dating billions or trillions of years back can still provide very good information. Unlike the genetic or molecular evidences, fossils are must better as fossils can even make it possible to see the actual shape of the structure from unseen creatures which could have just occurred through imagination. It also provides best information on the evolution of species through natural selection. 6. Fossils definitely are best sources that provide supporting information on the theory of evolution by natural selection... The advantage possessed by the fossils is that it can stay for very long period of time. They may be embedded in rocks on seabeds but it remains to provide good information as to what is being fossilized. Because of fossils, humans are able to give description how dinosaurs could probably look like and that could be very impossible if only genetics or molecular evidences are studied. Through fossils, theory on how different species changed their shapes and structure as the years went by were explained. The speculation that some birds evolved from dinosaur through the study of fossils is quite amazing but who knows, someday a fossil that can strongly support the theory may prove it true.