Galápagos Iguana Essay

Charles Darwin, a geologist in the United Kingdom, traveled by ship called H.M.S. Beagle around the world in five years from 1831 so that he would survey the Pacific Coast of South America. When he called at the Galápagos Island, he realized that even though in the same species, they changed their figure according to their environment for a long time. Moreover, Charles Darwin supposed that all creatures were a natural part of the evolutionary process. Galápagos iguana is a good example of this supposition. There are three types of iguanas, namely land, marine and black and white in the Galápagos Island. Now I would like to mention two differences and similarities between the three kinds of Galápagos iguana.
One similarity of three types of the iguana inhabits only the Galápagos Islands. This is because the Galápagos islands are in the
What black and white iguanas eat are a mixture of marine and land iguanas. The land iguana mainly feeds on cactus leaves and flowers because they cannot climb trees. Therefore, they have difficulty finding food, and they are greatly influenced by the number of surviving the cactuses. However, the marine iguana mainly eats not only cactus leaves and flowers but also algae. The warm waters around the Galápagos Islands provide a good environment for algae. The usual warming of the ocean is known as the El Niño phenomenon. In the ocean waters, the temperature, however, has risen to nearly 30 degrees, resulting in a big decrease in algae and plankton. As the water quality around the Galápagos Islands is deteriorating, the marine iguanas began to look for food on land rather than in the sea. Therefore or consequently, black and white iguanas, a hybrid of between the land iguanas and marine iguanas, were born. Needless to say, they can eat algae, and it is incredible that they are able to eat tall cactus because they inherited the sharp claws so that they could climb