BIO 120 Exam 1 Questions with Complete Solutions 2024

BIO 120 Exam 1 Questions with Complete Solutions 2024 Pasteur's experiment provided conclusive evidence to reject the spontaneous generation hypothesis, which states that cells arise from nonliving material. As a consequence, his results supported the all-cells-from-cells hypothesis. Which element of Pasteur's experimental design was most important and why? His two treatments differed only in the shape of the flask, resulting in exposure of only one of the treatments to preexisting cells. Correct. Because he was testing whether exposure to preexisting cells is required to produce new cells, it was essential that the only difference between treatments was the factor being tested. In Pasteur's experiment, the purpose of the swan neck on the flask was to: provide a fertile environment for cells to grow. allow the experimenter to boil the medium to sterilize it. kill cells from the air before they reach the growth medium. trap cells from the air before they reached the growth medium. trap cells from the air before they reached the growth medium.