CAMPBELL BIOLOGY IN FOCUS-TEXT,AP ED.
3rd Edition
ISBN: 9780136811206
Author: Urry
Publisher: SAVVAS L
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Textbook Question
Chapter 20.4, Problem 1CC
What is a molecular clock? What assumption underlies the use of a molecular clock?
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Chapter 20 Solutions
CAMPBELL BIOLOGY IN FOCUS-TEXT,AP ED.
Ch. 20.1 - Based on the tree in Figure 20.4, are leopards...Ch. 20.1 - Which of the trees shown here depicts an...Ch. 20.1 - Prob. 3CCCh. 20.2 - Decide whether each of the following pairs of...Ch. 20.2 - WHAT IF? Suppose that two species, A and B, have...Ch. 20.3 - Prob. 1CCCh. 20.3 - The most parsimonious tree of evolutionary...Ch. 20.3 - Prob. 3CCCh. 20.4 - What is a molecular clock? What assumption...Ch. 20.4 - MAKE CONNECTIONS Review Concept 14.5. Then...
Ch. 20.4 - WHAT IF? Suppose a molecular clock dates the...Ch. 20.5 - Why is the kingdom Monera no longer considered a...Ch. 20.5 - Prob. 2CCCh. 20.5 - Prob. 3CCCh. 20 - In a comparison of birds and mammals, the...Ch. 20 - To apply parsimony to constructing a phylogenetic...Ch. 20 - Prob. 3TYUCh. 20 - Prob. 4TYUCh. 20 - Prob. 5TYUCh. 20 - If you were using cladistics to build a...Ch. 20 - Prob. 7TYUCh. 20 - SCIENTIFIC INQUIRY DRAW IT (a) Draw a phylogenetic...Ch. 20 - FOCUS ON EVOLUTION Darwin suggested looking at a...Ch. 20 - Prob. 10TYUCh. 20 - SYNTHESIZE YOUR KNOWLEDGE This West Indian manatee...
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- How did Spiegelman et al.' s experiments in 1967 & 1970 on the origins of natural selection provide evidence for natural selection in an RNA-based world? A) The starting RNA strand was originally ~4,000 nucleotides; after several serial transfers it was reduced to ~200 nucleotides as a result of faster replication of shorter sequences being advantageous and selected for. B) The starting RNA strand was originally ~4,000; after several serial transfers and the introduction of additional RNA molecules it increased to ~20,000 nucleotides as a result of hybridization with the longer RNA molecules having outcompeted shorter RNA strands. C) The RNA remained at approximately is original sequence of ~4,000 nucleotides, demonstrating fitness in a stable environment. D) These experiments did not demonstrate natural selection.arrow_forwardWhich are the Seven model organisms whose genomes were sequenced as part of the Human Genome Project?arrow_forwardHow do molecular biology explain the evolution of life?arrow_forward
- You want to make a phylogenetic tree of a group of three related species of lizards that live on an island. Their genome sequences are highly similar except for a gene that controls body size. In that region of the genome, one of the lizard species has one copy of the growth control gene (L1), the second species has a duplication of the growth control gene (L2) and the third species has three copies of the same gene (L3). The lizard species show an increase in size depending on how many copies of the growth control gene they have (L1 is smallest, L2 is medium-sized and L3 is largest). Is this enough information to determine the phylogenetic relationships between the species, and predict which of the species arrived on the island first (and is the ancestral species)? Yes, because the ancestral lizard genome probably had a single copy of the growth control gene and after arriving on the island it was duplicated, resulting in species L2, and then another duplication occurred resulting in…arrow_forward10) Two processes that take place within a cell are shown here. Which of these statements correctly identify the processes and their outcomes? Select ALL that apply. A) Both processes increase genetic variation. B) Both processes can produce new phenotypes in an organism. C) Process II occurs randomly while process I is predictable. D) Process I is beneficial to the organism while process II is detrimental. E) Only process I can provide the basis for natural selection acting on phenotypes. Not Gradedarrow_forwardWhat assumption underlies the use of genetic sequence differences between species as a molecular clock?arrow_forward
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- How does molecular biology paved way for the development of the DNA fingerprinting technique? and what is its molecular basis?arrow_forwardwhat is the role of gene duplication, whole genome duplication, transposable elements, and horizontal gene transffer in genome evolution?arrow_forwardWhat is genetic flow? A) Genes changing due to mutation B) Random loss of genes in a small population C) Movement of genes between different populationsarrow_forward
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