Biology
10th Edition
ISBN: 9780073383071
Author: Raven
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Textbook Question
Chapter 39, Problem 3A
Your friend informs you that it is highly likely all of the plants in your yard are “infected” with some kind of
a. Remove all your plants because they are likely to die.
b. Spray your plants with chemicals to remove all bacteria and fungi.
c. Remove all your plants and replace the soil.
d. Do nothing because many of these bacteria and fungi may be beneficial.
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a) Biofilm is:
a.
a complex established community of microorganisms on solid surfaces
b.
is a layer of millions of identical bacteria on solid surfaces
c.
is a layer of compounds released from the tissue as a protection against pathogenic microorganisms
d.
All of these are correct
b)
Capsule formation is associated with the virulence of pathogenic bacteria. Why? Select all that apply.
a.
They are sticky and attach better
b.
They can escape phagocytosis
c.
The capsule makes them grow/multiply faster
d.
They kill immune cells
Which of the following statements is incorrect?
a. Mucosal surfaces are better than skin surfaces at supporting colonization by commensal microorganisms.
b. The skin provides a larger surface area than mucosal surfaces for commensal microorganisms.
c. There are ten times as many bacteria residing in the intestinal tract than the number of cells in the human body.
d. It is common for commensal bacteria to live in symbiosis with their human hosts.
e. During gestation in mammals, a fetus does not have any commensal microorganisms on their skin or mucosal surfaces.
During this outbreak, some people sickened with listeriosis testedpositive for Listeria monocytogenes in their bloodstream, but a DNAprofile of the bacterium showed that it was not the outbreak strain.What likely conclusion can be drawn from this information?a. It is a false positive.
b. The person is not part of the outbreak.c. Listeria monocytogenes mutates frequently, making DNAprofiling unreliable.d. The person has already begun to recover from the disease.
Chapter 39 Solutions
Biology
Ch. 39 - Nonnative invasive species are often a threat to...Ch. 39 - Prob. 2UCh. 39 - Prob. 3UCh. 39 - Prob. 4UCh. 39 - Parasitoid wasps protect plants from caterpillars...Ch. 39 - In response to wounding, a tomato plant first...Ch. 39 - When a cell undergoes a hypersensitive response,...Ch. 39 - The wound response products that bind to digestive...Ch. 39 - If a plant has been attacked by a pathogen, then...Ch. 39 - Prob. 1A
Ch. 39 - Both plant and animal immune systems can a....Ch. 39 - Your friend informs you that it is highly likely...Ch. 39 - Prob. 4ACh. 39 - You decide to plant a garden with a beautiful...Ch. 39 - Prob. 6ACh. 39 - Prob. 1SCh. 39 - Parasitoid wasps seem like an effective method to...Ch. 39 - Prob. 3S
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