Biology
Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Chapter 25, Problem 2FIB
Summary Introduction

Introduction:

Phylum chordate is comprised of three clades; the groups which are evolved from the same ancestry: the lancelets, the craniates, and the tunicates. Chordates are two types vertebrate and invertebrate.

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Pair the words with the right description:  Mammalia , Testudines, Rhynchocephalia, Amniota             Tetrapoda,Cryptodira, Reptilia ,Squamata, Crocodylia, Pleurodira, Lepidosauria,Archosauria,Crocodiles, Anura          The oldest lineage of extant reptiles.         This clade is the sister taxon to reptiles.     Adults are terrestrial and nocturnal, while the young are diurnal.  Larval forms of most species are herbivorous while adults are insectivorous/carnivorous.  The closest living relatives of avian reptiles.  They are known as the "side necked" turtles.     Have elongate, tapering snouts and, with the mouth closed, the 4th tooth on the lower jaw is visible.       Most diverse and speciose clade of reptiles.  Adults of this taxon are known to be cannibalistic on younger individuals.      Possess teeth set in bony sockets and replace teeth throughout their lives.      Males in this taxon have paired copulatory organs and movable quadrate bone in the skull.  Members of this order…
Which of the following statements about bilaterian animals is false? A. Many bilaterians are invertebrates but some are not. B. All bilaterians are triploblastic (have three germ layers). C. All bilaterians have bilateral symmetry. D. Most bilaterians have tissues but some do not.
Figure 15.33 Which of the following statements about common features of chordates is true?a. The dorsal hollow nerve cord is part of the chordate central nervous system.b. In vertebrate fishes, the pharyngeal slits become the gills.c. Humans are not chordates because humans do not have a tail.d. Vertebrates do not have a notochord at any point in their development; instead, they have a vertebral column.
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