Evolutionary history of life

Phylogeny of Sphyrna- Hammerhead Sharks INTRODUCTION I will be investigating the phylogenetic history of Sphyrna, a genus of hammerhead sharks. The eight species that fall under this genus are Sphyrna corona (scalloped bonnethead), Sphyrna gilberti (Carolina hammerhead), Sphyrna lewini (scalloped hammerhead), Sphyrna media (scoophead), Sphyrna mokarran (great hammerhead), Sphyrna tiburo (bonnethead), Sphyrna tudes (smalleye hammerhead), and Sphyrna zygaena (smooth hammerhead). Hammerhead sharks…

The Evolutionary Theory is a relatively new concept that has not been thoroughly proven until just recently, though the actual development of it ranges back before the 19th century. Before the theory was introduced, Carolus Linnaeus had started a new system for naming specific species- a two name system that further categorizes them based on characteristics; developed in 1735. Then in 1795, James Hutton proposed the concept that the Earth gradually changed over time; a result from changes in…

Lamoureaux, who believed that you could be a Christian and still believe in evolutionary theory, wrote the book I love Jesus and Accept Evolution. Evolution is the theory that animals evolved into different species over time. A lot of times people who believe in evolution are not Christians, but there are some Christians who do believe that you can be a Christian and still believe in evolution. This is a controversy because some people believe that if you are a Christian, you cannot believe in…

mating preferences based on evolutionary roots would decline in gender-equal societies (Zentner & Mitura, 2012). Zentner and Klaudia focused on two theories for mate preferences of evolutionary origins and social structural. Evolutionary based on reproductive success, however, the article states the theory is limited and leads to assumptions and hypothesis. The social structure theory supports the more equal-gender a society is the gender difference in mates is on future life prediction. A piece…

cytochrome oxidase is considered to be a very important event in evolutionary history. However, not much is known on the development and emergence of this enzyme. Molecular data demonstrates how cytochrome oxidase emerged before the divergence of archaea and bacteria, and well before the great oxidation event. This paper proposes a research plan to investigate the origins of cytochrome oxidase. Background Throughout the three domains of life, a variety of metabolisms are present in a vast amount…

taste buds are right behind the last line of teeth in both the upper and lower jaws, indicating a significant relation amongst biting and tasting. These undifferentiated cells additionally oversee the teeth's capacity to recover throughout the shark's life, and it turns out the shark's taste buds likewise share this capacity. We realize that taste buds developed in primitive fishes before oral teeth because taste bud-like structures are existent in jawless fishes such as lampreys. So if…

The originators of the ethnological theory were E. B. Tylor and A. Lang.Ethology studies the behavior of animals and humans from an evolutionary perspective Darwin, Lorenz and Tinbergen, and Bowlby and Ainsworth Human Ethology studies the biological basis of behavior. It is concerned with the adaptive, or survival, value of behavior and its evolutionary history. Its roots can be traced to the Darwin’s Theory of Evolution. Two European zoologists, Konrad Lorenz and Nikolaas Tinbergen, laid…

One misconception of Darwinian evolutionary theory is that evolution is at a random chance. Natural selection is actually the stated opposite of random chance (Ryan p. 50). Although genetic drift and mutation play roles in evolution as causing chance events that result in a change in population, that does not mean that evolution as a whole is due to randomness. Natural selection is the greatest force of modern evolution, and is completed by the passing on of successful genes, not by random…

No one has influenced our knowledge of life on Earth as much as the English naturalist Charles Darwin 1809-1882. His theory of evolution by natural selection, now the unifying theory of the life sciences, explained where all of the astonishingly diverse kinds of living things came from and how they became exquisitely adapted to their particular environments. His theory reconciled a host of diverse kinds of evidence such as the progressive fossil record, geographical distribution of species,…

are related to wolves.20 Phylogenetic trees are diagrams that represent the possible evolutionary relationships between different species. While phylogenetic trees are diagrams usually showing actual evolutionary relationships, cladograms are diagrams that show arbitrary and hypothesized evolutionary relationships.21 Comparative anatomy is used to study evolutionary changes and provide insight into evolutionary relationships. Comparisons of body structures are made to create links between…