8. This question is based on the following passage. Both Seagulls and wild geese are large birds. They're also similar in that both kinds of birds can fly over great distances. On the other hand, seagulls are
scavengers, while wild geese aren't. Seagulls, for example, are often found around garbage dumps. Geese, however, feed on things like seeds and insects.
Another important difference between the two kinds of birds is that geese fly on long annual migrations of well over 1,000 miles. Seagulls will migrate far inland
to search for food. However, they don't follow seasonal patterns of migration like wild geese.
Clue words showing that contrasts are being made in this paragraph include
A. both and difference.
B. while and however.
C. also and hand.
D. and and similar.

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.