What Is Life? A Guide to Biology with Physiology
4th Edition
ISBN: 9781319065447
Author: Jay Phelan
Publisher: W. H. Freeman
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Chapter 12, Problem 8MC
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Introduction:
About 65 million years ago, the dinosaurs were wiped out in a mass-extinction event.
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After the mass extinction that occurred 65 million years ago, mammals rapidly diversified to occupy habitats that were previously unavailable to them. What concept does this illustrate? A. Adaptive radiation B. Cretaceous selection C. Reproductive isolationD. Heterozygote advantage
Which of the following statements about the fossil record is true?
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Scientists are examining the possible role of a large asteroid in the cretaceous mass extinction event. A large asteroid strike would likely have caused rapid climate cooling and the diffusion of sunlight. which of the following statements are the best null and alternative hypotheses when scientists look at the geologic evidence of extinction related to the asteroid strike?
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What Is Life? A Guide to Biology with Physiology
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- which statement about macroevolution is true? a. The history of life on Earth follows a general trend toward increasing diversity marked by rare mass extinction events. b. The theory of punctuated equilibrium proposes that most evolutionary changes occur over long periods of time. c. The theory of gradualism proposes that major evolutionary changes happen relatively rapidly and are then followed by long periods of little change. d. All scientific understandings are complete, as scientific investigations have now filled in all remaining gaps.arrow_forwardDescribe a scientific hypothesis to explain the mass extinction of dinosaurs and many other organisms at the end of the Cretaceous Period.arrow_forwardIdentify each of the following as an example of MICROEVOLUTION or MACROEVOLUTION.Then，state whether it supports the theory of gradualism or punctured equilibrium.（a） The Cambrian explosion（a period of rapid evolutionary change where many complex organisms evolved）.（b）The evolutionary change of animals and terrestrial plants.（c）beetles with a GREEN sheen are more prevalent than beetles with a BLACK sheen.arrow_forward
- Adaptive radiation is common following a period of mass extinction, probably because (a) the survivors of a mass extinction are remarkably well adapted to their environment (b) the unchanging environment following a mass extinction drives the evolutionary process (c) many adaptive zones are empty(d) many ecological niches are filled (e) the environment induces changes in the timing of development for many speciesarrow_forwardAardvarks, anteaters, and pangolins are only distantly related but are similar in structure and form as a result of (a) homology (b) convergent evolution (c) biogeography (d) vestigial structures (e) artificial selectionarrow_forwardThrough _______, a body part of an ancestor is modified differently in different lines of descent. a. homologous evolution c. adaptive divergence b. morphological convergence d. morphological divergencearrow_forward
- There have been five main mass extinctions. Match each mass extinction event to its description. 1. Permian extinction 2. Cretaceous-Tertiary extinction 3. Triassic extinction 4. Devonian extinction 5. Ordovician extinction a. This extinction was most likely due to a change in sea level. During this event, about 60% of all marine species were eliminated. b. This is the best-known mass extinction. It eliminated most large animals, including the dinosaurs. c. This was the most severe extinction event. About 96% of life on Earth died during this event. d. This extinction was most likely caused by climate change. About 80% of land animals died during this event. e. This extinction was most likely due to a change in sea level. It especially affected coral reefs.arrow_forwardWhich of the following terms most specifically describes what occurs when a group of organisms expands to take on new ecological roles, forming new species and higher taxonomic groups in the process? (a) speciation (b) mass extinction (c) evolution (d) adaptive radiationarrow_forwardAn analysis of a phylogeny that displays data about the fossil record over time reveals all of the following EXCEPT A. Several extinction events occurred. B. Evolution results in a clear directional pattern. C. Evolution is the result of interactions between organisms and their environment. D. Evidence of continental drift exists.arrow_forward
- Fossils show that dinosaurs originated between 200 and 250 million years ago. Would you expect the geographic distribution of early dinosaur fossils to be on multiple continents or on a single continent? Explain. Hint: refer to continental drift in your explanation.arrow_forwardBecause mass extinction is a natural process that may facilitate evolution during the period of thousands to millions of years that follow it, should humans be concerned about the current mass extinction we are causing? Why or why not?arrow_forwardThe time of greatest evolutionary diversification in the history of life occurred during the (a) Cambrian period (b) Ordovician period (c) Silurian period (d) Carboniferous period (e) Permian periodarrow_forward
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