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1. Why do Coxiella show variable Gram stain results-that is, why would they stain gram-positive or gram-negative at different times? Tell which stage is G + and which stage is G-, Also, explain if Coxiella should be classified as gram-positive or gram-negative when classified?
2. What disease does C. burnetii cause? Why can this disease be transmitted by airborne routes while other (closely related) rickettsia species require insects and ticks for transmission to humans? Give an example of a closely related rickettsia species to Coxiella burnetii and tell how it is transmitted.
What is the role of mutation in the formation of species through hybridization?
Wild turkeys are dramatically sexually dimorphic; domesticated turkeys are less so. Suppose that wild female turkeys chose mates on the basis of expensive traits that indicate disease resistance and that artificial selection for rapid weight gain ..
Which of the following is not a type of viral reproduction?
32P is an unstable isotope of phosphorus that has a half-life of 14.29 days. Atoms of this isotope undergo beta decay in which a neutron decays into a proton and an electron.
Why are rapidly evolving DNA sequences useful for determining relationships only among taxa that evolved from quite recent common ancestors?
Researchers are developing blood substitutes to meet the demand for emergency transfusions. What would be the effect of artificial blood in which binding of O2 is not altered by acidity?
Describe how the water vascular system functions. What is the benefit of this adaptation for these animals?
Discuss and explain how do girls and boys differ in bullying behavior? What are some of the emotional consequences of being bullied?
Barbara McClintock, famous for discovering that genes might move within genomes, had her meticulous work ignored for nearly 4 decades, but eventually won the Nobel Prize. Why was her work so distrusted.
How do the components of the lymphatic system protect the body from disease?
Determine the possible DNA sequences that produced the four amino acids in the molecules
Which organelle generates oxygen? Which organelle consumes oxygen? Explain why are viruses not considered to be living?
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