EBK BIOLOGY
11th Edition
ISBN: 8220102797352
Author: Raven
Publisher: YUZU
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Chapter 47, Problem 5S
Summary Introduction
To explain:
How birds digest different food given they lack teeth like mammals.
Introduction:
Birds have two chambered stomach. One of the chambers is called the glandular stomach (proventriculus) and is similar in function to the mammalian stomach. The other chamber is called the gizzard (muscular stomach).
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Ungulates
Ungulates, such as deer, reindeer, and elk, are hoofed mammals. These animals have keen hearing, clear vision, supple, well-conditioned muscles, and razor sharp reflexes. The evolution of the four-chambered stomach in ungulates developed as a result of a need to eat quickly in the open and chew later in the safety of cover. This process is called ruminating or "chewing the cud." In other words, ungulates regurgitate and then re- chew their food.
Which of the following would be considered a physiological adaptation of ungulates?
A) their four-chambered stomach B) their long legs, which help them outrun predators
C) their ability to stand perfectly still, which helps them avoid predators
D) their ability to hibernate to avoid cold winters
Mammals are very diverse. For example, do all mammals have four legs? Do you recall any mammals with more or fewer than two eyes?
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.
Chapter 47 Solutions
EBK BIOLOGY
Ch. 47 - How is the digestion of fats different from that...Ch. 47 - Although the stomach is normally thought of as the...Ch. 47 - After being absorbed through the intestinal...Ch. 47 - Which of these pairings is incorrect? a. Fat...Ch. 47 - Intestinal microorganisms aid digestion and...Ch. 47 - Prob. 6UCh. 47 - Which of the following represents the action of...Ch. 47 - Prob. 1ACh. 47 - The primary function of the large intestine is to...Ch. 47 - Inactive forms of some molecules are secreted a....
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