Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 1, Problem 2CBQ
Summary Introduction
To discuss:
Examples in which one species has evolved characteristics that affect its interactions with a different species.
Introduction:
An ecological community consists of populations of different species living in the same area. When different species live together they have to interact with each other. This is called interspecific interactions. These interspecific interactions may have positive effects, negative effects or it may be neutral for one of the participants or for both. The major types of interspecific interactions are
- - Mutualism − positive effects on both species
- Predation − positive on one species, negative on other species
- Commensalism − positive on one species, neutral on the other species
- Amensalism− neutral on one species and negative on the other species
- Competition − negative on both species
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19. On the diagram below
a. Label the three pictures as: DNA; polypeptide; or RNA.
b. Label the arrows as: translation or transcription/RNA processing.
c. Add the following details to the diagram.
Promoter region
TATA box
Transcription start site
Transcription terminator
Intron (A,B,C,D)
Exons (1,2,3,4,5)
Splice sites
5' cap
5' UTR (untranslated region)
3' poly A tail
3' UTR (untranslated region)
Translational start (AUG)
Translational stop (UGA, UAG, or UAA)
N and C ends of polypeptide
0000
Match the letter labels in the figure below to the terms. Some letter
labels are not used.
MNNNNNNIN
M
C
B
A
M
D
F
E
H
K
G
8
The diagram below illustrates a quorum sensing pathway from Staphylococcus aureus. Please answer the following questions.
1. Autoinduction is part of the quorum sensing system. Which promoter (P2 or P3) is critical for autoinduction?
2)This staphylococcus aureus grows on human wounds, causing severe infections. You would like to start a clinical trial to treat these wound infections. Please describe:
a) What molecule do you recommend for the trial. Why?
b) Your trial requires that Staphylococcus aureus be isolated from the wound and submitted to genome sequencing before admittance. Why? What are you testing for?
3) If a mutation arises where the Promoter P3 is constitutively active, how would that influence sensitivity to AIP? Please explain your rationale.
4) This pathway is sensitive to bacterial cell density. Describe two separate mutation that would render the pathway active independent of cell density. Briefly explain your rationale.
Mutation 1
Mutation 2
Chapter 1 Solutions
Principles of Biology
Ch. 1.1 - Look ahead to Figure 4.15. Which of these...Ch. 1.1 - The wing of a bird, the wing of an insect, and the...Ch. 1.1 - At which level of biological organization would...Ch. 1.1 - Prob. 2TYKCh. 1.2 - Among mammals, give two examples of how the tail...Ch. 1.2 - Prob. 2CCCh. 1.2 - Prob. 1BCCh. 1.2 - Prob. 3CCCh. 1.2 - Prob. 1TYKCh. 1.2 - Prob. 2TYK
Ch. 1.3 - Prob. 1CCCh. 1.3 - Prob. 2CCCh. 1.3 - Prob. 1TYKCh. 1.3 - Prob. 2TYKCh. 1.3 - Prob. 3TYKCh. 1 - A bird maintains a relatively stable internal body...Ch. 1 - Populations of organisms change over the course of...Ch. 1 - A bio1otst is studying the Living organisms in a...Ch. 1 - Which of the following is an example of horizontal...Ch. 1 - The scientific name for humans is Homo sapiens....Ch. 1 - The underlying factor that explains the unity and...Ch. 1 - By observing certain desert plants in their native...Ch. 1 - In science, a theory should be equated with...Ch. 1 - Conducting research without a preconceived...Ch. 1 - Prob. 10TYCh. 1 - Of the first eight characteristics of life...Ch. 1 - Explain how it is possible for evolution to result...Ch. 1 - In your own words, describe the 12 principles of...Ch. 1 - Discuss whether or not you think that theories in...Ch. 1 - Prob. 2CBQ
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