Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 34, Problem 1DAA
Summary Introduction
To determine: In which cities did the researchers record the highest and lowest sperm counts.
Introduction: Nowadays, the agricultural fields are extremely contaminated with pesticides that are applied in fields to destroy all pests. Pesticides are harmful chemicals with no specificity and are equally harmful to all the living beings. The pesticide not only kills the living environment, it also destroys the reproductive function of animals whose wombs are exposed to such chemicals. In many researches, it was found that the men working in the agricultural fields are more exposed to the pesticide, which may adversely affect their reproductive capability.
Expert Solution & Answer
Answer to Problem 1DAA
Correct answer: The highest sperm count is in City N and the lowest sperm count is in City C.
Explanation of Solution
Refer to Fig 34.22 “Characteristics of men in four cities” given in the question. Researcher S and her colleagues selected men from four cities from the US, namely City C, City L, City M and City N. Men from the cities were checked for their reproduction capabilities, especially the sperm count and sperm motility. From the given studies, it was found that men from the country with most farm lands were having a decreased sperm count and sperm motility. At the same time, the men in the area with no agriculture have the maximum sperm count and sperm motility.
Fig 34.22 shows that the sperm counts were 58.7 million/ml in City C (most of agricultural area) and in City N (with no agricultural area) the sperm count in men were 102.9 million/ml. Therefore, the city with the lowest sperm count is City C and the highest sperm count is in City N.
Conclusion
The highest sperm count is in City N and the lowest sperm count is in City C.
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Chapter 34 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 34 - Prob. 1DAACh. 34 - Sperm Counts Down on the Farm Contamination of...Ch. 34 - Sperm Counts Down on the Farm Contamination of...Ch. 34 - Sperm Counts Down on the Farm Contamination of...Ch. 34 - __________are signaling molecules that travel...Ch. 34 - A __________ is synthesized from amino acids and...Ch. 34 - Match each pituitary hormone with its target....Ch. 34 - Releasing hormones secreted by the hypothalamus...Ch. 34 - In adults, too much __________ can cause...Ch. 34 - Function of the __________ declines after puberty....
Ch. 34 - Low blood calcium triggers secretion by ________....Ch. 34 - _______ lowers blood sugar levels; ________ raises...Ch. 34 - Prob. 9SQCh. 34 - Secretion of _______ suppresses immune responses....Ch. 34 - Exposure to bright light lowers blood _________...Ch. 34 - Prob. 12SQCh. 34 - True or false? Only women make...Ch. 34 - Prob. 14SQCh. 34 - Prob. 15SQCh. 34 - Women who have been blind since birth almost never...Ch. 34 - A diabetic who injects too much insulin can lose...
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