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The normal pH range for systemic arterial blood is between 7.35 and 7.45. Any levels that drop below a pH of 7.35 is a condition known as acidosis. Any levels that rise above a pH of 7.45 is known as alkalosis. Acidosis can depress the central nervous system, which if […]

Q. A young entrepreneur is considering buying or leasing a Xerox machine for a photocopying business office. The cost of the Xerox machine is $24,000.the annual maintenance cost is $750. The likely annual revenue from photocopying is $5500. If he decides to lease the machine the annual cost is $4000 […]

In fruit flies the gene (y) for yellow body is sex-linked (inthe first chromosome) and recessive. Bar eye is produced by asex-linked dominant gene (B). The gene (Cy) for curly wings isdominant located on the second chromosome. The gene (Pm) for plumcolored eyes is a dominant also located in the […]

1 Homology is evidence of ______. A. directional selection B. convergent evolution C. genetic drift D. common ancestry 2 Which one of the following statements is true? A. Natural selection works on non-heritable traits. B. Natural selection works on variation already present in a population. C. Individuals evolve through natural […]