The Evolution of Whales

The Evolution of Whales “Their tongues alone can weigh as much as an elephant and their hearts as much as a car.” The animal called whales what are the largest, intelligent and aquatic mammals. However, whales were not the aquatic animals at the beginning. After thousands of years of evolution, since changes in the terrestrial environment and the demand for food, the whales become appearance like a graceful arc from the four limbs. We have to imagine that what happened in the past thousand years. So, today we will introduce the evolution of whales is interesting because it’s about the skeletal structure, life environment and foods.
Biological evolution is to experience of all species. Some species are disappearing in the evolutionary process, and the others are more and more advanced. People change from apes in the prehistoric period up to now; In order to grab the foods which are on the tree. Giraffe's neck is longer than previously. In “The Role of Natural Selection in Evolution”, author writes, “Evolution is the continuous genetic adaptation of a population of organisms to its environment over time. Evolution involves changes in the genes that are present in a population.” In other words, author says that the same animal is transformed the higher level. Evolution goes on the whole world and the whales are no exception.
The skeletal structure of whales changed a lot. That means that the body of whales went from four limbs to streamline and much bigger than before. In order to adapt to the new environment and find enough food to support them to survive. Their skeletal structure makes them more suitable for the prevailing environment that includes the sea and ocean, not live in the land like before. One crucial idea from “The Evolution of Whales” is when the author says, “The pelvis had evolved to be much reduced in size and separate from the backbone. This may reflect the increased use of the whole vertebral column, including the back and tail, in