Please address each question and submit the completed worksheet to the Unit 2 As

Please address each question and submit the completed worksheet to the Unit 2 Assignment Dropbox when completed.

Part I: Humans are the only mammals to have lived in the most extreme environments from remote islands, to deserts, and high mountains. For over 1,000 years the Bajau people, often referred to as sea nomads, have lived an almost entirely marine-dependent existence, gathering food and resources by freediving up to 230 feet without an oxygen tank. These freedivers spend approximately 60% of their working time under water. Scientists sought to determine whether the Bajau’s freediving abilities were the result of natural selection for certain genetic adaptations or if these abilities were due to practice and training within the Bajau’s culture during an individual’s lifetime. They designed an experiment comparing the Bajau to the Saluan, a nearby population that does not traditionally freedive. Scientists found that the Bajau had significantly larger spleens than the Saluan, even in individuals who were not freedivers. Watch the following video or review the following article:

● Ilardo, M., Moltke, I., Korneliussen, S., et. al. (2018, April 19). Physiological and genetic adaptations to diving in sea nomads. Cell, 173(3). https://www.cell.com/cell/fulltext/S0092-8674(18)30386-6

Then, address the following questions.

1. Why do you think scientists measured spleen size? Based on the reading, what role do you think the spleen plays in an individual’s ability to dive? Be specific in your answers and ensure that you are answering both questions.
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2. Give an example of a more specific, testable hypothesis for the larger spleen size and how it may contribute to the extraordinary diving abilities of the Bajau.
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Part II: List the physical evidence of evolution discussed in your textbook, Biology of Humans. Then, choose ONE of these and summarize it in your own words. The summary should be at least 50 words.
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Part III: Exploring your ecosystem. Look around your home or community and identify some of the biotic and abiotic factors within the ecosystem. List three biotic (living) and three abiotic factors in your environment. What are the specific characteristics of living things? Select one of the biotic organisms in your list and describe why it is biotic, ensuring that you apply each of the characteristics of life discussed in Unit 1.

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Part IV: During this week, you reviewed the characteristics of living things and the characteristics of our species, Homo sapiens. As we have learned, humans have biological (e.g., increase lung capacity) and cultural adaptations (e.g., using pots to cook food) that enable them to survive in even remote areas of our planet.

1. Describe one cultural and one biological adaptation exhibited by humans where you live.
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2. What cultural challenges might you face if you had to live among the Bajau? How might someone overcome some of the challenges listed in your response?
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References: (Note: Please provide references to any sources you consult, including your textbook. Please review APA-formatting guidelines and ensure that your references are properly formatted.