CAMPBELL BIO VOL2 W/MASBIOACC YTC >IC<
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ISBN: 9781269963473
Author: Reece
Publisher: Pearson Custom Publishing
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Chapter 21, Problem 8TYU
SYNTHESIZE YOUR KNOWLEDGE
Insects have three thoracic (trunk) segments. While researchers have found insect fossils with pain of wings on all three segments, modern insects have wings or related structures on only the second and third segment. It turns out that in modern insects, Hox gene products act to inhibit wing formation on the first segment The treehopper insect (above) is somewhat of an exception. In addition to having wings on its second segment, the treehopper's first segment has an ornate helinet that resembles a set of thorns, which a recent study has found to be a modified, fused pair of "wings." the thorn-like structure helps to Camouflage the treehopper In tree branches, thus reducing its risk of predation. Explain how changes in gene regulation could have led to the evolution of such a structure.
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Chapter 21 Solutions
CAMPBELL BIO VOL2 W/MASBIOACC YTC >IC<
Ch. 21.1 - Describe the whole-genome shotgun approach.Ch. 21.2 - Prob. 1CCCh. 21.2 - Explain the advantage of the systems biology...Ch. 21.2 - MAKE CONNECTIONS The ENCODE pilot project found...Ch. 21.2 - MAKE CONNECTIONS In Concept 20.2, you learned...Ch. 21.3 - The best estimate is that the human genome...Ch. 21.3 - Prob. 2CCCh. 21.3 - WHAT IF? What evolutionary processes might...Ch. 21.4 - Discuss the characteristics of mammalian genomes...Ch. 21.4 - VISUAL SKILLS Which of the three mechanisms...
Ch. 21.4 - Contrast the organizations of the rRNA gene family...Ch. 21.4 - MAKE CONNECTIONS Assign each DNA segment at the...Ch. 21.5 - Describe three examples of errors in cellular...Ch. 21.5 - Explain how multiple exons might have arisen in...Ch. 21.5 - What are three ways that transposable elements are...Ch. 21.5 - WHAT IF? In 2005, Icelandic scientists reported...Ch. 21.6 - Prob. 1CCCh. 21.6 - Prob. 2CCCh. 21.6 - Prob. 3CCCh. 21 - How did the Human Genome Project result in more...Ch. 21 - What has been the most significant finding of the...Ch. 21 - Compare genome size, gene number, and gene density...Ch. 21 - Explain how the function of transposable elements...Ch. 21 - How could chromosomal rearrangements lead to the...Ch. 21 - What type of Information can be obtained by...Ch. 21 - Bioinformatics intludes all of the following...Ch. 21 - Homeotic genes (A) encode transcription factors...Ch. 21 - Prob. 3TYUCh. 21 - DRAW IT Below are the amino acid sequences(using...Ch. 21 - EVOLUTION CONNECTION Genes important in the...Ch. 21 - scientific inquiry The scientists mapping the SNPs...Ch. 21 - Prob. 7TYUCh. 21 - SYNTHESIZE YOUR KNOWLEDGE Insects have three...
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- Insects have three thoracic (trunk) segments. While researchershave found insect fossils with pairs of wings on all threesegments, modern insects have wings or related structureson only the second and third segment. It turns out thatin modern insects, Hox gene products act to inhibit wingformation on the first segment. The treehopper insect (above)is somewhat of an exception. In addition to having wingson its second segment, the treehopper’s first segment has anornate helmet that resembles a set of thorns, which a recentstudy has found to be a modified, fused pair of “wings.” Thethorn-like structure helps to camouflage the treehopper intree branches, thus reducing its risk of predation. Explain howchanges in gene regulation could have led to the evolution ofsuch a structure.arrow_forwardThe sequence of genes in a hypothetical animal cell is normally A-B-C-D. This results in normal development. Due to a mutation, the genes change position (A-C-D-B) resulting in abnormal development. This research was originally conducted and verified by which biologist?arrow_forwardA CRISPR locus in a bacterium contains (a) short repeated sequences (b) short DNA sequences homologous to bacteriophages (c) genes that encode guide RNAs and one or more proteins (d) a, b, and c (e) none of the precedingarrow_forward
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