List the various mechanisms viruses employ to evade the host immune system. A) Viruses use several different mechanisms to evade host immunity. They can mutate their outer surface proteins to evade neutralizing antibody, they can adopt a latent lifecycle, they can express proteins very close or identical in sequence to host proteins in order to elicit an autoimmune response, they can express soluble antigens to bind up circulating antibodies, they can interfere or inactive cytokine signaling, they may inactivate immune cells, and they can block the triggering of apoptosis. B) Viruses use

Texas has an impending storm, and california is experiencing a water crisis. match the technologies with the state that can use them to reduce the effects eddies natural hazards. texas is the storm cellar and the wood that is crisscrossed. california is the dam and the storage tanks

Astudent from one of the research labs is having trouble preparing a slide for examination and photographing. the bacterial slide that he has brought to you was prepared using a commercially purchased stain. he has asked for your in determining what he is doing wrong so that he can change the lab protocols and continue on with his project. after examining the slide under oil immersion, you determine that no bacteria are present even though the student is able to show you the culture he used to make that slide that has visible growth in the liquid medium. which of the following statements does not explain the fact that there are no bacteria present on the student’s slide? by not allowing a glass slide to completely air dry before heat fixation, the flame will cause the surrounding water to boil and this will damage the bacterial cell. overheating during the fixation step boiled the water within the bacterial cells and resulted in the cells bursting. insufficient heating of the slide did not drive out the thin layer of water and this resulted in minimal bonding between the bacteria and the glass slide. rinsing with alcohol during the washing step stripped the bacteria off the glass slide. rinsing with alcohol during the washing step stripped the bacteria off the glass slide.

Climate like that in the sahara desert have the fastest rates of weathering