Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337408332
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 18, Problem 15SQ
Summary Introduction
Concept introduction: The term “master regulator gene” was coined by Susumu Ohno over 30 years ago. The development of an organism from a fertilized egg from its embryonic stage to adulthood requires the synchronized expression of sets of genes at the right times and in the proper places. Master regulator genes are the sets of genes that are responsible for the expression of normal body features of an adult one.
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Mutations are __________.
A. The sole source of variation in a sexually reproducing organisms
B. The ultimate source of variation in sexually reproducing organisms
C. Both genetic and chromosomal in nature
D. All of these are correct
Certain species of blind fish living in perpetual darkness in the ocean depths have evolved from ancestors
that could see. Research indicates that the brain centers for vision in these fish is degenerating, whereas
the brain centers controlling other senses are enlarging. What might be the MOST probable reason for the
loss of vision in these fish?
O
A. exposure to mutagens that caused the loss of vision
B. progressive selection of genetic variants in the population leading to blindness as an
evolutionary adaptation
C. infection by cave-dwelling microorganisms that has led to degeneration of the eyes
O D. extreme high pressure at the ocean depths causing a deterioration of vision
An inguinal hernia results from ___
a.
testes that move out of the body where they develop like they do in fish
b.
disks between vertebrae slipping when backbone alignment is off
c.
the downward pressure on arteries unique to bipedal primates
d.
failing valves in veins returning blood to the heart of bipedal primates
e.
a sex-linked recessive allele that was carried by female descendants of Queen Victoria
Chapter 18 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 18 - Hawaiian Honeycreeper Phylogeny The po'ouli...Ch. 18 - Hawaiian Honeycreeper Phylogeny The po'ouli...Ch. 18 - Hawaiian Honeycreeper Phylogeny The po'ouli...Ch. 18 - Hawaiian Honeycreeper Phylogeny The po'ouli...Ch. 18 - Prob. 1SQCh. 18 - Which of the following assumptions is not part of...Ch. 18 - Prob. 3SQCh. 18 - Prob. 4SQCh. 18 - In a cladogram, each node represents a(n) _______...Ch. 18 - Constructing a cladogram _______ . a. may involve...
Ch. 18 - In cladograms, sister groups are _______ . a....Ch. 18 - Through ______, a body part of an ancestor is...Ch. 18 - Homologous structures among major groups of...Ch. 18 - Prob. 10SQCh. 18 - Molecular clocks are based on comparisons of the...Ch. 18 - Prob. 12SQCh. 18 - All of the following data types can be used as...Ch. 18 - Choose the statement that is incorrect. a....Ch. 18 - Prob. 15SQCh. 18 - Match the terms with the most suitable...Ch. 18 - In the late 1800s, a biologist studying animal...Ch. 18 - The photos shown above illustrate a case of...Ch. 18 - Bonobas and chimpanzees are sister groups. Humans,...
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