Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337408332
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 25, Problem 1CT
In 1798, a stuffed platypus specimen was delivered to the British Museum. Reports that it laid eggs created much confusion. To modem biologists, a platypus is clearly a mammal. It has fur and the females produce milk. Young animals have typical mammalian teeth that are replaced by hardened pads of the “bill” as the animal matures. Why do you think modem biologists can more easily accept that a mammal can have some reptilelike traits than scientists who were considering this animal in the late 1700s?
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Students have asked these similar questions
A biologist is trying to infer how five closely related species of snakes are related to one another. She notices that some of the snakes have forked tongues and others do not. Which of the following would help her distinguish the ancestral state?
Group of answer choices
She looks at a representative mammal species to see if it has a forked tongue.
She locates a specimen of a more closely related snake to see if it has forked tongue.
She looks among snakes fossils for evidence that being forked is a characteristic of the ancestor of this group, but determines no such fossil exist.
She flips a coin.
Which of the following is a correct way to distinguish reptiles from amphibians?
a. Reptiles have scales & amphibians don't
b. Amphibians lay eggs and reptiles don't
c. Reptiles sometimes don't have legs, but amphibians always have them.
d. Reptiles go through metamorphosis and amphibians don't
e. Reptiles lay eggs and amphibians don't
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 25 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 25 - Deathly Lamprey Repellent Predation by sea...Ch. 25 - Deathly Lamprey Repellent Predation by sea...Ch. 25 - Prob. 3DAACh. 25 - Prob. 4DAACh. 25 - Prob. 1SQCh. 25 - Which of the traits listed above are retained by...Ch. 25 - Vertebrate jaw banes evolved from ___ . a. gill...Ch. 25 - Prob. 4SQCh. 25 - Tetra pods evolved from ___ . a. sharks b....Ch. 25 - Turtles, Lizards, and birds belong to one major...
Ch. 25 - Prob. 7SQCh. 25 - Prob. 8SQCh. 25 - Prob. 9SQCh. 25 - Feathers and hair consist mainly of ___ . a....Ch. 25 - Prob. 11SQCh. 25 - ______ have scaleless skin and a heart with three...Ch. 25 - Prob. 13SQCh. 25 - Prob. 14SQCh. 25 - Arrange the groups in order in which they evolved....Ch. 25 - In 1798, a stuffed platypus specimen was delivered...Ch. 25 - Controlling forbody size, would you expect a...Ch. 25 - Why is it more difficult to determine the sex of a...Ch. 25 - Prob. 4CT
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