EBK CAMPBELL BIOLOGY IN FOCUS
2nd Edition
ISBN: 8220101459299
Author: Reece
Publisher: PEARSON
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Chapter 20, Problem 11TYU
SYNTHESIZE YOUR KNOWLEDGE
This West Indian manatee (Trichechus manatus) is an aquatic mammal. Like amphibians and reptiles, mammals are tetrapods (vertebrates with four limbs). Explain why manatees are considered tetrapods even though they lack hind limbs, and suggest traits that manatees likely share with leopards and other mammals (see Figure 20. 12b). How might early members of the manatee lineage have differed from today's manatees?
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This West Indian manatee (Trichechus manatus) is an aquaticmammal. Like amphibians and reptiles, mammals are tetrapods (vertebrates with four limbs). Explain why manatees areconsidered tetrapods even though they lack hind limbs, andsuggest traits that manatees likely share with leopards andother mammals (see Figure 26.12b). Discuss how early members of the manatee lineage might have differed from today’smanatees.
Human embryos have tails which become tail bones before birth. Tails also appear in fish, reptiles, amphibians, birds, and
mammals Humans also have hair and produce milk to nourish the young, which is unique to mammals. What does this indicate?
a close evolutionary connection between humans and many other mammals
a very distant evolutionary connection between humans and many other mammals
a very distant evolutionary connection between humans and many other reptiles
a close evolutionary connection between humans and many other reptiles
On a research expedition to the Galapagos, you and your research team discover four new species! All the animals appear to be chordates, but each animal has distinct traits:
Animal A: Both vertebral column and jaws
Animal B: Vertebral column, jaws, limbs and lays amniotic eggs (amniote)
Animal C: Vertebral column
Animal D: Vertebral column, jaws and limbs
A. Identify four derived characteristics that all chordates share.
B. Based on your understanding of phylogeny, map the animals and their traits onto the phylogenetic tree provided below. In your response, list each number (1-8) and indicate which trait or animal corresponds to that position on the phylogenetic tree.
Chapter 20 Solutions
EBK CAMPBELL BIOLOGY IN FOCUS
Ch. 20.1 - Which levels of the classification in Figure 20.3...Ch. 20.1 - Which of the trees shown here depicts an...Ch. 20.1 - Prob. 3CCCh. 20.2 - Decide whether each of the following pairs of...Ch. 20.2 - WHAT IF? Suppose that two species, A and B, have...Ch. 20.3 - Prob. 1CCCh. 20.3 - The most parsimonious tree of evolutionary...Ch. 20.3 - WHAT IF? Draw a phylogenetic tree that includes...Ch. 20.4 - What is a molecular clock? What assumption...Ch. 20.4 - MAKE CONNECTIONS Review Concept 14.5. Then...
Ch. 20.4 - WHAT IF? Suppose a molecular clock dates the...Ch. 20.5 - Why is the kingdom Monera no longer considered a...Ch. 20.5 - Prob. 2CCCh. 20.5 - Prob. 3CCCh. 20 - In a comparison of birds and mammals, the...Ch. 20 - To apply parsimony to constructing a phylogenetic...Ch. 20 - Prob. 4TYUCh. 20 - Prob. 5TYUCh. 20 - If you were using cladistics to build a...Ch. 20 - Prob. 7TYUCh. 20 - SCIENTIFIC INQUIRY DRAW IT (a) Draw a phylogenetic...Ch. 20 - FOCUS ON EVOLUTION Darwin suggested looking at a...Ch. 20 - Prob. 10TYUCh. 20 - SYNTHESIZE YOUR KNOWLEDGE This West Indian manatee...
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