Connect Access Card for Raven Biology 1
11th Edition
ISBN: 9781260224177
Author: Peter Raven an
Publisher: MCG
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Textbook Question
Chapter 1, Problem 1A
What is the significance of Pasteur’s experiment to test the germ hypothesis?
a. It proved that heat can sterilize a broth.
b. It demonstrated that cells can arise spontaneously.
c. It demonstrated that some cells are germs.
d. It demonstrated that cells can only arise from other cells.
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Students have asked these similar questions
Which statement about spontaneous generation is false?
A.
It addresses the formation of living cells from previously nonliving material.
B.
This was a common belief for during the Middle Ages.
C.
Pasteur demonstrated that it does not occur under normal laboratory conditions.
D.
It occurs every time a new species evolves from a preexisting species.
E.
It apparently occurred at least once – when life on Earth began.
What was the key finding from Griffith’s experiments using live and heat-killed pathogenic bacteria?
a. Bacteria with a smooth coat could kill mice.
b. Bacteria with a rough coat are not lethal.
c. DNA is the genetic material.
d. Genetic material can be transferred from dead to live bacteria.
What would the results of Pasteur's swan-neck flask experiment have looked like if they supported the theory of spontaneous generation? B. What did Pasteur's experiments not prove? C. How would the presence of endospores in Louis Pasteur's nutrient solutions have affected his conclusions about spontaneous generation?
Chapter 1 Solutions
Connect Access Card for Raven Biology 1
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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- A doctor is researching new ways to treat biofilms on artificial joints. Which approach would best help prevent bacterial colonization of the medical implants? a. Increase antibiotic dosing b. Create implants with rougher surfaces c. Vaccinate patients against all pathogenic bacteria d. Inhibit quorum sensingarrow_forwardWhich is a piece of evidence that supports the endosymbiotic theory? Select all that apply. (Group of answer choices) A. many bacteria are resistant to antibiotics B. eukaryotic cells have cell membranes C. mitochondria have their own DNA D. chloroplast DNA is more similar to cyanobacteria DNA than eukaryotic DNA E. ribosomes are present in eukaryotic cells F. mitochondria must divide to multiply, cells can't build themarrow_forwardWho was the first person to observe live cells under the microscope? a. Robert Hooke b. Anton van Leeuwenhoek c. Matthias Schleiden d. Theodor Schwannarrow_forward
- The term "Superbug" refers to? A. Certain bacteria strain that can grow in all kinds of unfavorable conditiions B. Certain bacteria strain is more toxic than all the viruses C. Certain bacteria strain that is resistant to all available antibiotics D. Certain bacteria strain that grows faster than any other strainsarrow_forwardWhich statement is true of reverse transcriptase? a. It is a nucleic acid. b. It infects cells. c. It transcribes RNA to make DNA. d. It is a lipid.arrow_forwardWhich is NOT true of the Tuskegee Syphilis Study? a. Participants never saw doctors or nurses b. Participants were given the newly discovered penicillin c. The study was an important reason the U.S. developed ethical standards for experiments d. Poor black men were chosen as participantsarrow_forward
- Which of the following can be used to grow and study viruses? A. embryonated eggs B. living animals. C. cell cultures D. continuous cell lines such as HeLa cells.arrow_forwardWhich choice correctly shows the relative amounts of non-coding DNA? A. A human has a greater relative amount of non-coding DNA than an elephant. B. An elephant has a greater relative amount of non-coding DNA than a fruit fly. C. A fruit fly has a greater relative amount of non-coding DNA than a bacterium. D. A bacterium has a greater relative amount of non-coding DNA than an archaean,arrow_forwardWho invented the forerunner of the microscope? a. Zacharias Janssen b. Anton van Leeuwenhoek c. Albrecht von Roelliker d. Rudolf Virchowarrow_forward
- How are cancer cells different from normal human cells? A. They lack a nucleus B. They have a cell wall instead of a membrane C. They reproduce quickly and have different life cycles D. They are made up of facts and lipids instead of carbonarrow_forwardWhat are prions? A. misfolded versions of normal proteins that can cause disease B. mobile segments of DNA C. tiny circular molecules of RNA that can infect plants D. viral proteins that attach to the genome of a host and cause diseasearrow_forwardAccording to the endosymbiotic theory, why was it adaptive for the larger (host) cell to keep the engulfed cell alive, rather than digesting it as food? A. The host cell would have been poisoned if it had digested the engulfed cell. B. The host cell was able to survive anaerobic conditions with the engulfed cell alive. C. The engulfed cell provided the host cell with CO2 D. The engulfed cell provided the host cell with ATP. E. The engulfed cell allowed the host cell to metabolize glucose.arrow_forward
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