Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Question
Chapter 54, Problem 20TYK
Summary Introduction
Introduction: Pathogens are the microorganisms that are capable of causing various types of diseases in the organisms. These pathogens can be highly virulent in a new habitat where host species have not evolved yet.
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The term active transmission refers to:
a. A person who catches a disease from a bug bite
b. A person who catches a disease from contaminated food
c. A person who catches a disease from a contaminated object
d. A person who coughs in public and passes the disease to those around them
Which of the following statements is correct?
a.
Serial interval is the length of time a person can transmit or shed an infectious agent
b.
Contamination of the drinking water source of a community by infectious agent(s) will likely result in a continuous common source epidemic
c.
It is not possible for people who have not shown symptoms of measles yet, to transmit measles infection
d.
Mary Mallon was a chronic carrier of Vibrio cholerae
Which of the following describes "incubation period"?
a.
It is the time interval between entry of an infectious agent into the body and the appearence of the first symptoms and/or signs of the disease
b.
It is the time after recovery when a person can still harbor the infection
c.
It is the time interval through which an infected person is able to transmit the infectious agent to others
d.
It is the time interval between the onset of primary and secondary cases
Chapter 54 Solutions
Study Guide for Campbell Biology
Ch. 54 - When two spiny mouse species coexist, Acomys...Ch. 54 - Name the type of mimicry described in each of the...Ch. 54 - Name and give examples of the interspecific...Ch. 54 - Tide pool 1 has three species of sea urchins with...Ch. 54 - Prob. 5IQCh. 54 - Describe the effects of the alder stage on soil...Ch. 54 - Why would the fact that tropical communities are...Ch. 54 - a. How do the rates of immigration and extinction...Ch. 54 - Why are ecologists trapping and testing migrating...Ch. 54 - Complete the following concept map to organize...
Ch. 54 - Community ecologists develop models or hypotheses...Ch. 54 - Two allopatric species of Galapagos finches have...Ch. 54 - The greater blue-ringed octopus (Hapalochlaena...Ch. 54 - Two other species of octopus (H. maculosa and H....Ch. 54 - Two species, A and B, occupy adjoining...Ch. 54 - Two shops in the same block are selling coffee and...Ch. 54 - A palatable (good-tasting) prey species may defend...Ch. 54 - Most humans are host to mites of the genus Demodex...Ch. 54 - The species richness of a community refers to the...Ch. 54 - You have a friend who is a strict vegan; that is,...Ch. 54 - Ecologists survey the tree species in two forest...Ch. 54 - When one species was removed from a tide pool, the...Ch. 54 - Invasive species often reach a large biomass...Ch. 54 - Why do most food chains consist of only three to...Ch. 54 - According to the top-down (trophic cascade) model...Ch. 54 - During succession, inhibition by early species a....Ch. 54 - According to the nonequilibrium model, a. chance...Ch. 54 - Which of the following shows a mismatch between...Ch. 54 - Prob. 18TYKCh. 54 - A major explanation for the decline in species...Ch. 54 - Prob. 20TYK
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- Which of the following is not true? a. Cockroaches can transport a variety of parasites, usually on their external surface. This is an example of mechanical transmission by a vector b. A contamination will inevitably lead to an infection c. Case fatality rate is one of the indicators of virulence of an infectious agent d. None of the pandemics prior to COVID-19 were caused by a coronavirusarrow_forwardKeeping your food covered, especially outdoors, when it is not actually being eaten is a way to prevent contracting an illness through the ____route of infection. a. biological vector b. mechanical vector c. parenteralarrow_forwardWhich of the following is a mis-match? a. Urogenital - often associated with sexually transmitted pathogens b. Respiratory - spread by sneezing C. Parenteral - pathogen is passed from mother to child through the placenta O d. Gastrointestinal - often involves fecal-to-oral transmission e. Conjunctiva - involving eyesarrow_forward
- Define the following terms: a. virus b. virion c. capsid d. retrovirus e. enveloped virusarrow_forwardThe disease from the list below which has a bacterial etiology is: A. Strep throat B. Asthma C. influenzaarrow_forwardA seasonal outbreak of influenza would be an example of what type of outbreak? a. point-source b. common-source c. propagated d. a and b e. a, b, and carrow_forward
- Which of the following statements correctly describes exotoxins and endotoxins produced by various bacteria? A. endotoxins are secreted into the environment while the bacteria are still alive B. exotoxins are secreted into the environment while the bacteria are still alive C. exotoxins are only released into the environment when the bacteria die and their cell walls break down D. exotoxins are components of the outer membrane of the bacteria that produce themarrow_forward54. Which vector control mechanism involves individual behaviors and decisions?A. Fumigation of communitiesB. Improving sanitation measures C. Introduction of sterile vectorsD. Using vector repellants 55. Which of the following conditions is classified as a chronic disease?A. ConjunctivitisB. Diabetes mellitus C. MeaslesD. Mumpsarrow_forward
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