BIOLOGY-CONCEPTS+APP.CHAP 1-15>CUSTOM<
17th Edition
ISBN: 9781337450607
Author: STARR
Publisher: CENGAGE LEARNING (CUSTOM)
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Chapter 43, Problem 1SA
Summary Introduction
Introduction:
The rotation of the earth around the sun is in an elliptical path. The Earth axis is not perpendicular to this plane of ellipse and is tilted at an angle of 23o. This results in changes in daylight, temperature and seasons in different parts around the earth. Summer season occurs when the Northern Hemisphere of the earth is tilted fully towards the sun.
Expert Solution & Answer
Answer to Problem 1SA
Correct Answer:
The Northern Hemisphere of the earth is tilted mostly towards the sun in the summer season. Hence, correct answer is option b.
Explanation of Solution
Reasons for correct answer:
Summer season is a result of the tilted Northern Hemisphere mostly towards the sun. This makes the Northern Hemisphere to receive more sunlight, and increase in day light. In June, the Northern Hemisphere tilts towards the sun, receiving direct sunlight, resulting in more daylight than the Southern Hemisphere, which is away from the sun.
Hence, option b is correct.
Reasons for incorrect answer:
Option a. is given as, “spring.”
The Northern Hemisphere of the earth is tilted mostly towards the sun in the summer season not in spring. Hence, option a. is incorrect.
Option c. is given as “autumn”
Spring and autumn are results of moving of Northern Hemisphere away from the sun, but not completely towards the sun. Seasonal variations occur due to the tilting of the earth, rotation of the earth and its revolution around the sun. Spring and autumn do not result when Northern Hemisphere tilts mostly towards the sun. Hence option c. is incorrect.
Option d. is given as “winter”
When the Northern Hemisphere experiences winter, it will be tilted away from the sun, but not near. So option d is incorrect.
Hence options a., c., and d. are incorrect
Conclusion
Summer season occurs in the Northern Hemisphere due to its maximum tilting towards the sun. Thus, correct option is b.
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Students have asked these similar questions
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 43 Solutions
BIOLOGY-CONCEPTS+APP.CHAP 1-15>CUSTOM<
Ch. 43 - Prob. 1SACh. 43 - Which latitude will have the most hours of...Ch. 43 - Prob. 3SACh. 43 - Prob. 4SACh. 43 - Prob. 5SACh. 43 - ____________ have a deep layer of humus-rich...Ch. 43 - Prob. 7SACh. 43 - Prob. 8SACh. 43 - Prob. 9SACh. 43 - Prob. 10SA
Ch. 43 - Chemoautotrophic bacteria and archaea are the...Ch. 43 - Prob. 12SACh. 43 - Prob. 13SACh. 43 - Unrelated species living in geographically...Ch. 43 - Prob. 15SACh. 43 - Prob. 1CTCh. 43 - Owners of off-road recreational vehicles would...Ch. 43 - Prob. 3CTCh. 43 - London, England, is at the same latitude as...Ch. 43 - Prob. 5CT
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