Which of the following conclusions can be accurately drawn by analyzing both the silk road trade and the african gold-salt trade?

a. in both cases, wealthy asian and european traders were able to exploit african merchants. as a result, african countries suffered from trade.

b. in both cases, islam spread among societies that traded with one another. this contributed to islam becoming the dominant religion in africa and asia.

c. in both cases, socieites were brough into contact through trade. the cultural exchanges that went along with that trade enriched those societies.

d. in both cases, interactions between societies led to conflict despite the success of trade contacts. these clashes left trading societies vulnerable.

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.