Biology, 08.07.2019 00:30 kayleefaithblair
Which of the following are geochemical cycles important for recycling and balancing earth materials? 1) carbon and nitrogen cycles 2) hydrologic and rock cycles 3)hydrologic and tectonic cycles 4)rock and tectonic cycles
Answers: 1
Biology, 22.06.2019 13:00
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.
Answers: 1
Biology, 23.06.2019 00:30
Which are results of technological advances? people's increased exposure to new ideas the development of an increasingly global culture their value by people around the world the bringing of harmony to diverse groups of people the reduction of the number of people living in rural areas
Answers: 1
Which of the following are geochemical cycles important for recycling and balancing earth materials?...
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