BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 21.1, Problem 1LO
Summary Introduction
To determine: The way by which species of Darwin’s finches have adapted to feed in different ways.
Introduction: Darwin’s finches are the Galapagos type of small birds, which all are different from each other, but belong to the same ancestors. Approximately 15 species are included in these types of species of passerine birds. The birds are called Darwin’s finches, as the scientist discovered the hypothesis of evolution in these birds.
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Chapter 21 Solutions
BIOLOGY
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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- Explain why geographic variation in garter snake preychoice might indicate that the behavior evolved bynatural selection.arrow_forwardData was collected concerning Galapagos bird beak size over time. There are 13 types of Galapagos finches, and they are also known as Darwin's Finches. These finches share the same habits and characteristics except for one; they all have different beaks. The differences in their beaks might be the most important aspect of their survival because beak size determines the type of seed able to be eaten. Only the birds with the largest of beaks are able to eat the toughest, biggest, and spine covered seeds. Based on the data given, choose the BEST conclusion. A) This data shows that over time the type of food available remained constant. Eliminate B) This data shows that the environment did not change over the course of time. C) This data shows a fluctuation in bird species over time most likely due to food availability. D) This data shows a fluctuation in bird species over time most likely due to the inheritance of acquired characteristics. Not Gradedarrow_forwardDarwin’s finches have different beaks in terms of size and shape to be able to eat different food sources like insects, nectar, and seeds. Cactus finches have longer, more pointed beaks to probe cactus flowers compared to their relatives, the ground finches. If a plant disease killed a large portion of the cacti on the Galapagos islands, what would the future populations of finches look like in terms of beak size and shape? Use your knowledge of natural selection to determine which option is most likely. Ground finches would survive and pass on their shorter and wider beaks, so there would be a higher proportion of finches in future generations that have short and wide beaks. Ground finches would survive and pass on their beaks, but they would mate with the remaining cactus finches, creating a new hybrid that is somewhere between short versus long and narrow versus wide. Cactus finches would compete for food with ground finches and exhibit resource partitioning, so the beaks…arrow_forward
- describe the various eco-morphological and behavioural adaptations and strategies of Hemisus marmoratus (marbled snout-burrower) to survive in its environmentarrow_forwardDarwin explained that the difference in beak shape among Galapagos finches as being result of adaptations to eating different food. Its true or false? explain.arrow_forwardHow would self-sacrifice of male redback spiders be an adaptive behaviour? Select one: a. When males meet a female and self-sacrifice, it activates enzymes that make his sperm more fit and able to fertilize more eggs. b. Males are able to mate with one female, then mate with another female nearby, before being devoured by the first female. C. Males only use self-sacrificing behaviour once they have mated with several females and have exhausted their sperm supplies. d. The chance of a male meeting more than one female is quite low; self-sacrifice maximizes mating time with and sperm transfer to any female the male finds.arrow_forward
- Describe one trait that tarsiers share with lorises and lemurs. Describe one trait that tarsiers share with the anthropoids.arrow_forwarddescribe some hypotheses for the evolution of cooperation in animal societies?arrow_forwardThe Nopoli rock-climbing goby uses mouthparts modified into a sucker to climb up waterfalls as tall as 330 feet. It also uses this sucker to scrape food off surfaces. Which of the following statements would be TRUE if we were to call the sucker an adaptation for climbing? The sucker evolved originally under selection for its feeding function and was later coopted for climbing. The sucker evolved originally under selection for its climbing function and was later coopted for feeding. The sucker evolved originally due to drift and was later coopted for feeding.arrow_forward
- Describe the phenomenon in which two organisms occupying the same geographical area show the same strategies of adaptation.arrow_forwardWhy does central place foraging cause animals that travel farther to bring back larger amounts of food?arrow_forwardHow ecological interactions eventually lead to the evolution of adaptations?explain with an example.arrow_forward
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