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EBK LIFE: THE SCIENCE OF BIOLOGY
11th Edition
ISBN: 8220103935432
Author: Sadava
Publisher: MAC HIGHER
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Chapter 19.5, Problem 1R
Summary Introduction
To review:
The evolution of diverse body forms in arthropods by mutations in the developmental genes.
Introduction:
Arthropods are animals with jointed appendages and constitute over 90% of the total animals in the animal kingdom. It includes an incredibly diverse group of taxa such as spiders, insects, scorpions, crustaceans, and centipedes. The organisms from different taxa have the common characteristic feature of arthropods but their body forms are relatively different from each other.
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Students have asked these similar questions
What is the role of segmentation and tagmatization in the evolutionary success of the arthropods?
Discuss the idea that every evolutionary adaptation has both advantages and disadvantages, using each of the following as an example: (a) cephalization,(b) the arthropod exoskeleton, and (c) segmentation with specialization.
1) Which statement about lungs and gas bladders is true?
A) the first osteichthyans had lungs and these lungs were later converted to gas bladders in actinopterygians
B) the first osteichthyans had gas bladders and these gas bladders were later converted to lungs in sarcopterygians
C) after the two lineages branched apart, actinopterygians evolved gas bladder and sarcopterygians evolved lungs"
2) Why are sharks reliant on ram ventilation unable to breath while remaining in place like other fish do?
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EBK LIFE: THE SCIENCE OF BIOLOGY
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