Biology
12th Edition
ISBN: 9781260494570
Author: Raven, Peter
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 1, Problem 2S
The classic experiment by Pasteur (figure 1.4) tested the hypothesis that cells arise from other cells. In this experiment cell growth was measured following sterilization of broth in a swan-necked flask or in a flask with a broken neck.
a. Which variables were kept the same in these two experiments?
b. How does the shape of the flask affect the experiment?
c. Predict the outcome of each experiment based on the two hypotheses.
d. Some bacteria (germs) are capable of producing heat-resistant spores that protect the cell and allow it to continue to grow after the environment cools. How would the outcome of this experiment have been affected if spore-forming bacteria were present in the broth?
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Chapter 1 Solutions
Biology
Ch. 1.1 - Compare biology to other natural sciences.Ch. 1.1 - Prob. 2LOCh. 1.1 - Prob. 3LOCh. 1.2 - Compare the different types of reasoning used by...Ch. 1.2 - Demonstrate how to formulate and test a...Ch. 1.3 - Examine Darwins theory of evolution by natural...Ch. 1.3 - Describe the evidence that supports the theory of...Ch. 1.4 - Discuss the core concepts that underlie the study...Ch. 1 - Data analysis What is the effect of reducing the...Ch. 1 - Inquiry question Might this effect be achieved...
Ch. 1 - Prob. 2IQCh. 1 - Prob. 1UCh. 1 - Prob. 2UCh. 1 - A hypothesis in biology is best described as a. a...Ch. 1 - Prob. 4UCh. 1 - The cell theory states that a. cells are small. b....Ch. 1 - The molecule DNA is important to biological...Ch. 1 - The organization of living systems is a. linear...Ch. 1 - The idea of evolution a. was original to Darwin....Ch. 1 - What is the significance of Pasteurs experiment to...Ch. 1 - Which of the following is NOT an example of...Ch. 1 - How is the process of natural selection different...Ch. 1 - If you found a fossil for a modem organism next to...Ch. 1 - The theory of evolution by natural selection is a...Ch. 1 - In which domain of life would you find only...Ch. 1 - Evolutionary conservation occurs when a...Ch. 1 - Exobiology is the study of life on other planets....Ch. 1 - The classic experiment by Pasteur (figure 1.4)...
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