Unity and Diversity A.3 Origin of Cells (id: 822a8e0aa)

本题目来源于试卷: Unity and Diversity A.3 Origin of Cells，类别为 IB生物学

[问答题]
Researchers carried out a similar experi 7rn4 qh8x4sbtt24pa rmentapjq bf dpq/*e: 74cr7 to Louis Pasteur’s famous experiment disproving spontaneous geqrd 7:*a7p c q4je/fbpneration, using the set up below at 30°C.



1.Outline the theory of spontaneous generation.

2.1.State two variables that must be controlled in this experiment.

2.2.Explain why it is important to have controlled variables in this study.

3.1.State the letters of three flasks which would show signs of decomposition of broth.

3.2.Explain your answer to part (i).

4.Suggest, with reasons, how the results of the study would differ if the flasks were incubated at 4°C.

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