Introduction of hypotheses

Marine mammals include the walruses and whales. Such as seals, dolphins as well as manatee their bodies are streamlined, under the skin blubber, reduced legs to flippers as well as in the water for survival other adaptations. On the other hand on land mammals evolved, these returned to the sea. The one question is raised is that they evolve from single ancestor that they returned to the ocean again? In that time we can’t go back and observe these things but the sequence of DNA contain the evidence related to the relationship of living creatures. By the help of this relationship we learn more the marine mammal’s evolutionary history.

In this lab, in GenBank, we utilize the information as well as for testing the hypotheses bioinformatics software is used that is regarding the aquatic mammals as well as their potential relationship of ancestral to land mammals. All mammals share the protein and we used this protein: beta protein hemoglobin. This test is good if it shows both conversations across species, as well as among the species variations. For example for long underwater dives holding their breath, in their hemoglobin may have evolved changes that improved the supply of oxygen these are unique challenges of the species. By many evolutionary biologists hemoglobin has been studied, from many different organisms in GenBank therefore the sequences are available.