EBK BIOLOGY
11th Edition
ISBN: 8220102797352
Author: Raven
Publisher: YUZU
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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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Students have asked these similar questions
Match the following questions
about the people who shaped the
field of Microbiology to the "BEST"
possible answer...
A. Used lenses to make drawings
of eukaryotes
B. His early work laid the
foundation for the study of plant
diseases
C. Discovered that organisms can
derive energy from several
different inorganic compounds
D. Conducted later experiments to
refute spontaneous generation
E. Carried out early widespread
vaccinations
F. His bacterial grouping system
laid the foundation for taxonomy
based on genetics
G. Published early accounts of
sexual transmitted diseases
H. Used lenses to make drawings
of prokaryotes
I. Conducted early experiments to
refute spontaneous generation
J. His bacterial grouping system
laid the foundation for taxonomy
based on morphology
Is organism 3 a plant, animal, or neither? Explain
describe the procedure you would use to perform test C and explain how the results of test C allowed you to determine if the test was positive or negative for organism 3
Many of the first prokaryotes to be cultured in a scientific lab were human or animal pathogens. Why would these species be more readily cultured than non-pathogenic prokaryotes? a. Pathogenic prokaryotes are hardier than nonpathogenic prokaryotes. b. Non-pathogenic prokaryotes require more supplements in their growth media. c. Most of the necessary culture conditions could be inferred for pathogenic prokaryotes. d. Pathogenic bacteria can grow as free bacteria, but non-pathogenic bacteria only grow as parts of large colonies.
Chapter 1 Solutions
EBK BIOLOGY
Ch. 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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