Campbell Biology, Books a la Carte Plus Mastering Biology with eText -- Access Card Package (10th Edition)
10th Edition
ISBN: 9780133922851
Author: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Publisher: PEARSON
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Chapter 41, Problem 41.4CR
How does human anatomy indicate that our primate ancestors were not strict vegetarians?
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Thousands of years ago, the jaws and teeth of jaguars were more varied in size than they are today. During a period of climate change about 11,000 years ago, jaguars faced a shortage of food. There were fewer mammals to eat, so the jaguars had to eat shelled reptiles. The jaguars with the largest jaws and teeth could most easily eat the shelled reptiles. Which of the following statements best explains why large jaws and teeth are common characteristics in jaguars today?
Jaguars with smallest jaws and teeth died out completely.
Jaguars with the smallest jaws and teeth were not able to mate.
Jaguars with the largest jaws and teeth survived and reproduced more successfully than the other jaguars.
Jaguars with the largest jaws and teeth strengthened them by using them more frequently than the other jaguars.
The presence of villi and smooth muscle increases the
surface area for nutrient absorption in the gut of many
animals.
This statement is
(T/F).
• If true, enter x in the blanks below.
• If false, then how would you change the sentence to
make it correct? You can change two words at most.
Changes that just reverse the meaning (e.g. changing "is"
to "isn't" or "all" to "none") will not earn credit.
I would change the word(s)
to the
word(s)
to make the sentence correct.
Can you suggest why, during the evolutionary history of animals, there has been a tendency for maximum body size to increase? Do you think it inevitable that complexity should increase along with body size? Why or why not?
Chapter 41 Solutions
Campbell Biology, Books a la Carte Plus Mastering Biology with eText -- Access Card Package (10th Edition)
Ch. 41.1 - An animal requires 20 amino acids to make...Ch. 41.1 - Prob. 2CCCh. 41.1 - WHAT IF? If a zoo animal eating ample food shows...Ch. 41.2 - Prob. 1CCCh. 41.2 - In what sense are nutrients from a recently...Ch. 41.2 - Prob. 3CCCh. 41.3 - Explain why a proton pump inhibitor, such as the...Ch. 41.3 - Thinking about our nutritional needs and feeding...Ch. 41.3 - Prob. 3CCCh. 41.4 - Prob. 1CC
Ch. 41.4 - What features of a mammal's digestive system make...Ch. 41.4 - WHAT IF? "Lactose-intolerant" people have a...Ch. 41.5 - Explain how people can become obese even if their...Ch. 41.5 - WHAT IF? Suppose you were studying two groups of...Ch. 41.5 - Prob. 3CCCh. 41 - Prob. 41.1CRCh. 41 - Propose an artificial diet that would eliminate...Ch. 41 - Prob. 41.3CRCh. 41 - How does human anatomy indicate that our primate...Ch. 41 - Prob. 41.5CRCh. 41 - Fat digestion yields fatty acids and glycerol....Ch. 41 - The mammalian trachea and esophagus both connect...Ch. 41 - Which of the following organs is incorrectly...Ch. 41 - Prob. 4TYUCh. 41 - After surgical removal of the gallbladder, a...Ch. 41 - If you were to jog 1 km a few hours after lunch,...Ch. 41 - DRAW IT Create a flowchart to summarize the events...Ch. 41 - Prob. 8TYUCh. 41 - SCIENTIFIC INQUIRY In human populations of...Ch. 41 - WRITE ABOUT A THEME: ORGANIZATION Hair is largely...Ch. 41 - SYNTHESIZE YOUR KNOWLEDGE Hummingbirds are well...
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- The evolution of jaws was a novel adaption that allowed organisms to process larger particles of food. True or false ?arrow_forwardWhat adaptive benefit do the three middle ear bones afford mammals? A) These bones helped to improve chewing, allow ancient mammals to diversify their diet. B) These bones improve hearing by allowing vibrations to be better picked up in air and the detection of higher frequencies. C) These bones allowed the detection of vibrations (hearing) for the first time in evolutionary history. D) These bones improve vision by providing an additional anchor point for the optic nerve.arrow_forwardWhich is NOT a common characteristic of mammals? A) have small brains compared to skull size B) have three middle ear bones C) have hair or fur D) young are fed milk produced by the mothers mammary glandsarrow_forward
- In the evolutionary tree of vertebrates, birds are most closely related to: a) Mammals b) Crocodiles c) Placoderms d) Salamandersarrow_forwardBy watching these videos, https://www.coursera.org/lecture/early-vertebrate-evolution/3-1-evolution-of-jaws-part-1-J4bOm https://www.coursera.org/lecture/early-vertebrate-evolution/3-1-evolution-of-jaws-part-2-d90NX How and why do jaws have evolved?arrow_forwardWhat are the genetic changes that allow the repurposing of existing body parts during evolution?arrow_forward
- 18) Grolar bears A) are a recently discovered new species of panda. B) are hypothetically possible, but have never been found to exist. C) is the name given to bears that invade cities and growl at the city residents. D) possess an adaptation that allows them to survive in very hot climates. E) result from the mating of a grizzly bear and a polar bear. 19) The region of the brain that controls all programmed body movements, like piano p A) cerebral cortex (other than the frontal cortex). B) frontal cortex. C) hypothalamus. D) cerebellum. E) medulla oblongata. В-3arrow_forwardWhat are the genetic changes thatallow the repurposing of existing bodyparts during evolution? For example,how did bat wings evolve from arms?arrow_forwardDesert owls are inactive during the day and active at night. They also have small bodies. This describes a ________ adaptation to the hot and dry desert. CHECK ALL THAT WOULD APPLY A)physiological B)anatomical C)behavioral D)No answerarrow_forward
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