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Q. Most biologists believe that the immune system's defence against infections largely rests on its capability to distinguish self molecules from non-self molecules. This concept seems central to our understanding of immune function. Yet, like all scientific ideas, it is not beyond question. Several immunologists have developed an alternative hypothesis: that the immune system's effectiveness rests mostly on its ability to recognize damage to body tissues caused by the invaders, not on the ability to recognize non-self. If you were going to test the "damage" hypothesis, what might you look for? Which form of cell would you expect to be directly affected by damaged tissues and why? Some proponents argue that the "damage" hypothesis makes more sense from an evolutionary perspective, claiming that it is more advantageous for an organism's defence system to respond to tissue damage than to the mere presence of a foreign microbe. Do you be in agreement? Why or why not?
If one assumes that Hardy-Weinberg equilibrium applies to population of colonists on this planet, about how many people will have attached ear lobes at what time the planet's population reaches 10,000.
A man and woman are both of normal pigmentation and have a one child out of three who is albino (without melanin pigmentation). Albinism is an autosomal (not sex-linked) recessive trait. What are the genotypes of albino's parents.
Explain the events that occur when epinephrine binds to a G-protein coupled receptor in the membrane of a cell. Begin with the binding of the epinephrine and end with the activation of adenylyl cyclase.
A patient has an 80 percent blockage of his left anterior descending coronary artery. Illustrate what occurs in terms of myocardial oxygen supply and demand if his sympathetic nervous system is stimulated.
What is the phenotypic ratio for the F2 generation? Demonstrate the work, including your key. what are Harry and Sally's blood types? Show your work. What if blood typing exposed Harry had type O blood.
Schupack attempted to exercise right in first refusal McDonalds would not recognize the right in Schupack, claiming that it was personal to Copeland and so non-assignable without their consent. Schupack brought an action for specific performance, req..
Which of the subsequent statements is true about phylogeny. The ancestral group frequently has all the synapomorphies of the descendant species.W hat phenotypes would be seen in the f2 and in what proportion.
In horses, black coat colour is dominant over chestnut. In gait, trotting is dominant over pacing. If a mare with a genotype of bbTt is bred to a stallion with a genotype of BbTt, what are the chances of a chestnut, pacer foal.
What are genotypes of the adult that were crossed. 0 percent of a population died from sunburn, of the 10 percent who died 10 individuals were albino and the rest were split evenly between heterozygous (Gg) and dominant individuals (GG). So my questi..
Why can prakaryotes quickly re infect a patient if they are not wiped out? How may this result in the evolution of drug resistant pathogens.
Your doctor prescribes a drug that should be taken orally. You don't like swallowing big pills, so in the place you crush the pill into a fine powder, dissolve it in saline, and inject it into a vein in your arm. Why is this really bad idea.
What is the hydraulic conductance of the arterial side. How could the venous conductance be smaller or bigger than the arterial conductance.
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