Biological Science (6th Edition)
6th Edition
ISBN: 9780321976499
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Emily Taylor, Greg Podgorski, Jeff Carmichael
Publisher: PEARSON
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Chapter 31, Problem 12PIAT
Hox genes are known to play a role in establishing the anterior- to-posterior identities of body regions of most animals. Michalis Averof and Nipam Patel compared the expression of Ubx-AbdAHox genes in different thorax segments during embryonic development in four crustaceans. The blue appendages in the diagram below represent maxillipeds; red appendages are legs (head appendages not shown). Which hypothesis about the relationship between Ubx-AbdA expression and the origin of maxillipeds do you think emerged from the data?
a. Maxillipeds were lost in segments where Ubx-AbdA genes were expressed.
b. Maxillipeds arose in segments where Ubx-AbdA genes were no longer expressed.
c. Maxillipeds arose in segments where Ubx-AbdA genes were expressed.
d. The presence of maxillipeds does not correlate with the pattern of Ubx-AbdA gene expression.
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INTRODUCTION
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Repeat measurement for tubes 2-5
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Data…
Ch.23
How is Salmonella able to cross from the intestines into the blood?
A. it is so small that it can squeeze between intestinal cells
B. it secretes a toxin that induces its uptake into intestinal epithelial cells
C. it secretes enzymes that create perforations in the intestine
D. it can get into the blood only if the bacteria are deposited directly there, that is, through a puncture
—
Which virus is associated with liver cancer?
A. hepatitis A
B. hepatitis B
C. hepatitis C
D. both hepatitis B and C
—
explain your answer thoroughly
Chapter 31 Solutions
Biological Science (6th Edition)
Ch. 31 - Prob. 1TYKCh. 31 - 2. What is the function of the arthropod...Ch. 31 - 3. One trait that is shared by the Lophotrochozoa...Ch. 31 - Which protostome phylum is distinguished by having...Ch. 31 - 5. Propose an explanation for why annelids and...Ch. 31 - 6. Use your understanding of protostome evolution...Ch. 31 - 7. Pose a hypothesis to explain why the evolution...Ch. 31 - 8. CAUTION Evaluate this statement Evolution is...Ch. 31 - Brachiopodais a phylum within the Lophotrochozoa....Ch. 31 - Adaptive radiations are said to occur when a...
Ch. 31 - How did feeding appendages called maxillipeds...Ch. 31 - 12. Hox genes are known to play a role in...Ch. 31 - 13. PROCESS OF SCIENCE Why are the evolutionary...Ch. 31 - Prob. 14PIATCh. 31 - 15. MODEL In amphipods, Ubx is normally not...Ch. 31 - True or False? The results in question 15 support...
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