Biological Science (6th Edition)
6th Edition
ISBN: 9780321976499
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Emily Taylor, Greg Podgorski, Jeff Carmichael
Publisher: PEARSON
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Chapter 25, Problem 11PIAT
Summary Introduction
To review:
Draw a well-labeled graph mentioning the geological eras and time periods of the Dromaeosauridae.
Introduction:
The Dromaeosauridae is the family of theropod dinosaurs. They were small to medium in size and are known to have flourished in the Cretaceous period. They first appeared in the Jurassic period, around 167 million years ago (mya). The Cretaceous period is defined as a geological period that existed around 145 mya at the beginning of the Paleogene period 66 mya.
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Chapter 25 Solutions
Biological Science (6th Edition)
Ch. 25 - 1. Choose the best definition of a fossil.
a. any...Ch. 25 - 2. CAUTION True or false? The absence of a trait...Ch. 25 - Which of the following best characterize an...Ch. 25 - Which of the following is an example of homoplasy?...Ch. 25 - 5. Why is parsimony a useful tool for assessing...Ch. 25 - Prob. 6TYUCh. 25 - Fossilization continues even today. If you wanted...Ch. 25 - Prob. 8TYUCh. 25 - 9. MODEL Use the data matrix below to draft a...Ch. 25 - Prob. 10TYPSS
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- The phylogenetic tree for 12 cat species (Felidae) reproduced at right was assembled from molecular sequence data. Which species is the domestic cats closest relative? Which clade is the sister taxon to tigers? Are bobcats more closely related to cougars or to ocelots? Source: From Warren E. Johnson et al. 2006. The late Miocene radiation of modern Felidae: A genetic assessment. Science 311:7377.arrow_forwardWhat are the Laetoli footprints? A. Fossilized footprints of Ardi walking across the landscape millions of years ago B. Fossilized footprints of Neanderthals walking across the landscape thousands of years ago C. Fossilized footprints and handprints of Australopithecines walking on all fours across the landscape millions of years ago D. Fossilized footprints of Australopithecines walking across the landscape millions of years agoarrow_forwardThe images below exhibit Y-5 molars. The left comes from a chimpanzee and the other is a zoomed-in image of Y-5 molars in a human. Why do these primates share the trait for Y-5 molars? Mark the best answer. Group of answer choices Unclear, cannot determine from the information given. Both inherited this trait from their common ancestor, which also had Y-5 molars. Convergent evolution, since both separately evolved Y-5 molars to adapt to dietary pressures. Random mutations, since having Y-5 molars is abnormal in these species of primate.arrow_forward
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- Direction: Provide answer below. It's not incomplete. Thank you in advance. -How would natural selection have caused changes in the size, feet, and teeth of the horse?arrow_forwardIn the past, the evolutionary history of whales was represented by cladogram A, shown below. As you can see, whales were believed to be closely related to mesonychids, an extinct group of mammals that looked similar to wolves. Today, that cladogram has been revised, as shown in cladogram B. Cladogram A Cladogram B Hippos Horses Hippos Whales Ruminants Pigs Camels Horses Mesonychids Time Time Which of the following statements best describes the reason for this change? Cladograms A and B are hypotheses that changed as new evidence became available. Cladogram B was revised to show a water-to-land pattern of evolution in groups of organisms. Cladogram B was altered to better include similarities in habitat as new information became available. Cladograms are organized today to show a much more simplified pattern like the one shown in cladogram B.arrow_forwardIn crossbill birds the beaks have a specialized shape to allow the crossbills to extract pine seeds out of cones. Crossbills in one forest feed on two different pine species. For one kind of cone a long thin beak is most efficient while in the other type of cone a short thick beak is most efficient. Birds with shapes in between these two shapes are not good at feeding on either type of cones. What evolutionary force is likely happening on beak shape? Group of answer choices A. disruptive (natural) selection B. intersexual selection C. intrasexual selection D. stabilizing (natural) selection E. directional (natural) selectionarrow_forward
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