Answers: 2
Biology, 21.06.2019 18:30
Which of the following represents the chemical reaction of hydrazine and hydrogen peroxide to produce nitrogen and water? a. nitrogen + hydrogen peroxide â hydrazine + water b. nitrogen + water â hydrazine + hydrogen peroxide c. hydrazine + hydrogen peroxide â nitrogen + water d. water + hydrogen peroxide â nitrogen + hydrazine
Answers: 3
Biology, 22.06.2019 02:00
The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important
Answers: 3
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 studentâs 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, 22.06.2019 17:00
Astudent completed a lab report. which correctly describes the difference between the âquestionâ and âhypothesisâ sections of her report? âquestionâ states what she is asking, and âhypothesisâ states the result of her experiment. âquestionâ states what she is asking, and âhypothesisâ states what she thinks the answer to that question is in âif . . then . . becauseâ format. âquestionâ describes what she is trying to find out, and "hypothesis" states the procedures and methods of data collection. âquestionâ describes what she is trying to find out, and âhypothesisâ states any additional information or prior knowledge about the question.
Answers: 1
All organisms begin life as a cell....
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