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Lab mice are immunized with a measles vaccine. When the mice are challenged with the measles virus to test the strength of their immunity, the memory cells do not completely prevent replication of the measles virus. The virus undergoes a few rounds of replication before the immune response is observed. You have developed a strain of mice with a much faster response to a viral challenge, but these mice often develop an autoimmune disease. Discuss the connection between the speed of response and an autoimmune disease.
What specific hypotheses would you test and what experimental procedures would you use to test these hypotheses?
If a trait had a broad-sense heritability of 1, what would it mean? 0.5? 0? What type of traits has a broad-sense heritability of 1? What type of traits has a heritability of zero?
Studying competition between the Peaks of Otter salamander and the Eastern Redback salamander would be an example of studying ecology at the _______ level.
The ability of urea diffusing across membranes of red blood cells. I was told that urea can easily penetrate the membrane as they are not present in high concentration inside the cell.
When doing the diffusion lab where you add blue and red dye to the corn syrup. Estimate the molecular weight of the blue and red dye compute the total distance traveled in (mm) and the speed of diffusion (mm/hr)?
Explain the difference between positive and negative control over transcription. Why is it advantageous for the lac operon in E. coli to be under both positive and negative control? What would happen if only negative control occurred? What would h..
What the benefits of plasmids in bacteria? Why is an enzyme’s activity affected by pH? Why is there so much diversity in bacteria shape? When you are standing the blood pressure is more in arms or in your legs. explain
a person eats dinner and leaves without paying. this is not an uncommon situation and it does go against some kind of
Describe the movement of water through the nephron including a description of the movement of salt and countercurrent multiplication.
If a random mating population contains 15% individuals expressing a recessive trait coded by a gene with two alleles, what percentage of zygotes are heterozygous?
Suppose that the lengths of the double-helical regions and the lengths of the single-stranded regions in them vary within relatively tight limits.
A black guinea pig crossed with an albino one gave 12 blackoffspring. When the albino was crossed with a second black one, 7 blacks and 5 albinos wereobtained. What is the best explanation for this genetic situation?
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