BIOLOGY 12TH ED (LL) W/ CONNECT
12th Edition
ISBN: 9781264898091
Author: Raven
Publisher: MCG
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Chapter 21.1, Problem 2LO
Summary Introduction
To determine: The way in which the climatic variation drives evolutionary changes in the medium ground finch.
Introduction: Gradual change in the heritable characteristics of species is known as evolution. The process of evolution is explained better by natural selection.
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Chapter 21 Solutions
BIOLOGY 12TH ED (LL) W/ CONNECT
Ch. 21.1 - Prob. 1LOCh. 21.1 - Prob. 2LOCh. 21.2 - Prob. 1LOCh. 21.2 - Distinguish between demonstrating that evolution...Ch. 21.3 - Contrast the processes of artificial and natural...Ch. 21.3 - Prob. 2LOCh. 21.4 - Prob. 1LOCh. 21.4 - Prob. 2LOCh. 21.4 - Prob. 3LOCh. 21.5 - Explain the evolutionary significance of...
Ch. 21.5 - Prob. 2LOCh. 21.6 - Prob. 1LOCh. 21.6 - Prob. 2LOCh. 21.7 - Characterize the criticisms of evolutionary theory...Ch. 21.7 - Prob. 2LOCh. 21 - Suppose that a male with a beak depth of 10 mm...Ch. 21 - Prob. 1IQCh. 21 - Prob. 2IQCh. 21 - Prob. 3IQCh. 21 - Why might the evolutionary line leading to...Ch. 21 - Artificial selection is different from natural...Ch. 21 - Gaps in the fossil record a. demonstrate our...Ch. 21 - The evolution of modern horses (Equus) is best...Ch. 21 - Homologous structures a. are structures in two or...Ch. 21 - Convergent evolution a. is an example of...Ch. 21 - Prob. 6UCh. 21 - The possession of fine fur in 5-month human...Ch. 21 - In Darwins finches, a. occurrence of wet and dry...Ch. 21 - Prob. 2ACh. 21 - Convergent evolution is often seen among species...Ch. 21 - What conditions are necessary for evolution by...Ch. 21 - Explain how data shown in figure 21.2a and b...Ch. 21 - Prob. 3SCh. 21 - Refer to figure 21.5, artificial selection in the...Ch. 21 - The ancestor of horses was a small, many-toed...
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- Observe the three species of fruit fly and their evolutionary relationships in the tree below: Fly species 1 MRCA of fly species 1 & 2 Fly species 2 Note that the three fly species have the following characteristics: Fly species 1: white eyes, lots of leg bristles, striped wings Fly species 2: red eyes, lots of leg bristles, striped wings Distant relative: white eyes, lots of leg bristles, plain wings Distant relative Q3. What are the most likely characteristics of the most recent common ancestor (MRCA) of fly species 1 and fly species 2, labeled in the diagram above? Lots of leg bristles; can't tell on the other two traits Lots of leg bristles, striped wings; can't tell on eye color Lots of leg bristles, striped wings, red eyes Lots of leg bristles, striped wings, white eyesarrow_forwardExplain why parapatric speciation is more likely to occur in sedentary organismsarrow_forwardProvide three biological reasons why sycamore aphid numbers and distributions may differ between leaves on the same tree?arrow_forward
- What is the common ancestor of the Galapagos finches? What are the thirteen Galapagos finches? What characteristics make each of the thirteen finches a distinct species? How is each finch isolated from the others? What habitat does each finch live?arrow_forwardDescribe the two kinds of reproductive isolating mechanisms and explain their role in speciation.arrow_forwardCompare the roles of reproductive isolation, geographic isolation, and competition in the speciation of Darwin's finches on the Galapagos Islands.arrow_forward
- Below is a phylogenetic tree of flightless birds. Which species is the common ancestor, with shared characteristics to the flightless birds shown below? A) Great spotted kiwi B) Chicken C) Ostrich D) Greater rheaarrow_forwardIn birds of paradise that populate tropical rainforest ecosystems, bright colored beaks and feathers are commonly found. These phenotypes continue to persist, even though brightly colored birds are more easily seen by predators. Which of the following would best describe the reason behind the persistence of these phenotypes in birds of paradise?arrow_forwardA species that has a high rate of long-distance dispersal is more likely to colonize new habitat. But that species may also be less likely to adapt to local conditions, because migration will be stronger than local selection pressures for many loci. In light of those considerations, when do you expect that increasing dispersal might result in the evolution of a larger geographic range, and when might it not?arrow_forward
- Evolution in Humans: 1) describe several techniques that paleontologists today use to establish fossil age 2) describe how tracking changes in DNA sequence among related organisms can be used to create a migration maparrow_forwardPre-mating barriers to reproduction often evolve relatively late in the process of speciation. Describe why post-mating reproductive barriers typically evolve before pre-mating barriers.arrow_forwardLook at picture attached A) What does the phylogeny suggest about the evolutionary process that led to the trait differences by habitat? a. convergent evolution b. adaptive radiation c. phenotypic plasticity B) Choose different functional forms from two of the habitats shown in the collage and describe how one or more differences in form may represent an adaptation to their different environment. Example: compare plant form for lobeliads in montane bog to cloud forest understoryarrow_forward
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