anthropologycoc101

Analogy/Homology     The two species that posses the homologous trait are whales and horses. The forearm is the homologous trait. The forearm in both mammals function the same where they allow the animal to move but in different ways. Both horse and whale come from a common decedent of a mammal. The main difference in both mammals is their primary function.The whale had a more of a swampy river environment which develops fins to make it more suitable for its environment. That is why the forearm is smaller because it does not need the pressure of gravity. The horse because it needs to run on land has a bigger forearm to support itself when running and the pressure of gravity when sprinting across the land. One is meant for running on land while the other is made to tread through the oceans water. These mammals are related because both have the similar bone structure on specifically being the forearm so we can assume that they came from a common ancestor. We can make this t...

One of the individuals that that influenced Darwin's Theory of Evolution was a French naturalist named Jean-Baptiste Lamarck. He developed a theory called the use-disuse theory. One of the contributions Lamarck made to the scientific community "was only one of the two mechanisms he proposed. As organisms adapted to their surroundings, nature also drove them inexorably upward from simple forms to increasingly complex ones"(O'Neil). Lamarck was trying to say that any species of animal doe not have genetic deficiencies and that they cannot go instinct. This theory of Lamarck is inaccurate because "only those traits that are influenced by genetic information contained within sex cells(eggs and sperm) can be inherited"(Jurmain, Kilgore, Trevathan, Ciochon, Bartelink 31).  This allowed Darwin to question whether or not a species can have deficiencies in the genes. He also had to question whether or not a species can go instinct. This allowed Darwin to go on and do...