Kierra is trying to decide which brand of lettuce seeds she would like to use in her garden this summer. After researching, she picked the two best-known brands to test. She decides to test them by planting one of each seed in a small space in her yard; her observations will be recorded so she can compare.
Which is the best example of a negative impact of planting only one seed from each brand?
A) She might confuse the plants if there is only one of each, resulting in incorrect observations.
B) She will not be able to collect enough measurements to create graphs to compare her data properly.
C) Sometimes seeds get incorrectly packaged in factories; one of the seeds she plants may not truly be a lettuce seed. She would not know this until after her study.
D) The one seed she chooses from either packet may be defective and grow improperly. She would only have results from a bad seed for that brand and not have true data from typical seeds of that brand.
Eliminate

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.