EBK BIOLOGY
11th Edition
ISBN: 8220101472069
Author: Byers
Publisher: PEARSON
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Question
Chapter 30, Problem 6RQ
Summary Introduction
To review:
To explain the concept of desertification.
Introduction:
The life on Earth is sustained by air, water, temperature, nutrients, and energy. The landscape of the Earth mainly consists of aquatic biome and terrestrial biome. The terrestrial biome includes forests, deserts, mountains, and chaparrals.
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Match the letter labels in the figure below to the terms. Some letter
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MNNNNNNIN
M
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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
There is currently a H5N1 cattle outbreak in North America.
According to the CDC on Feb 26*: "A multistate outbreak of HPAI A(H5N1) bird flu in dairy cows was first reported on March 25, 2024. This is the first time that these bird flu viruses had been found in cows. In the United States, since 2022, USDA has reported HPAI A(H5N1) virus detections in more than 200 mammals."
List and describe two mechanisms that could lead to this H5N1 influenza strain evolving to spread in human:
Mechanisms 1:
Mechanisms 2:
For the mutations to results in a human epidered they would need to change how the virus interacts with the human host. In the case of mutations that may promote an epidemic, provide an example for:
a protein that might incur a mutation:
how the mutation would change interactions with cells in the respiratory tract (name the receptor on human cells)
List two phenotypic consequence from this mutation that would increase human risk
Chapter 30 Solutions
EBK BIOLOGY
Ch. 30 -
1. Which of the following does not characterize...Ch. 30 - The biome that is mostly covered by grass and...Ch. 30 -
3. The part of a freshwater lake that typically...Ch. 30 -
4. Which of the following is True about ocean...Ch. 30 - 5. As the global climate warms, which of the...Ch. 30 -
1. The tilt of Earth on its axis produces...Ch. 30 - Of the four major requirements of life, which are...Ch. 30 -
3. The most biologically diverse terrestrial...Ch. 30 - The shallow portion of a large freshwater lake is...Ch. 30 - The primary producers of the open ocean are mainly...
Ch. 30 - Explain how air currents contribute to the...Ch. 30 - Prob. 2RQCh. 30 - Explain why traveling up a mountain in the...Ch. 30 -
4. Where are the nutrients of the tropical...Ch. 30 - List some adaptations of desert cactus plants and...Ch. 30 - Prob. 6RQCh. 30 - Prob. 7RQCh. 30 - Prob. 8RQCh. 30 -
9. What environmental factor best explains why...Ch. 30 - Where is life in the oceans most abundant, and...Ch. 30 -
11. Distinguish among the littoral, limnetic, and...Ch. 30 - Prob. 12RQCh. 30 - 13. Compare the source, transition, and floodplain...Ch. 30 -
14. Distinguish between the photic and aphotic...Ch. 30 - Fairbanks, Alaska, the plains of eastern Montana,...Ch. 30 -
2. Using Figures 30–3 and 30–4 as starting...
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