EBK INTEGRATED PRINCIPLES OF ZOOLOGY
17th Edition
ISBN: 8220103592406
Author: CLEVELAND
Publisher: YUZU
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Chapter 22, Problem 2RQ
Molecular sequence data indicate that Xenoturbella is a deuterostome. Are there corresponding morphological characters?
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What developmental characters are used to diagnose protostome and deuterostome groups (clades)?
What are three shared derived characters of deuterostomes?
Differentiate between Phylum Porifera and Clade Eumetazoa.
A)Poriferans are only haploid during their life cycle, whereas eumetazoans are diploid with haploid sex cells at various stages of their life cycle.
B)Poriferans have mobile gametes while eumetazoans do not.
C)Poriferans invert during their development whereas eumetazoans do not invert at any time during their life cycle.
D)The various cells types of Poriferans do not form permanent associations into true tissues during their life cycle, whereas Eumetazoa possess true, stable tissues.
E)Poriferans have only one kind of cell during their life cycle whereas Eumetazoa have many kinds of cells throughout their life cycle.
Chapter 22 Solutions
EBK INTEGRATED PRINCIPLES OF ZOOLOGY
Ch. 22 - Prob. 1RQCh. 22 - Molecular sequence data indicate that Xenoturbella...Ch. 22 - Prob. 3RQCh. 22 - How do we know that echinoderms were derived from...Ch. 22 - Prob. 5RQCh. 22 - Prob. 6RQCh. 22 - Prob. 8RQCh. 22 - What structures are involved in the following...Ch. 22 - Compare the structures and functions in question 9...Ch. 22 - Prob. 11RQ
Ch. 22 - Match groups in the left column with all correct...Ch. 22 - Define the following: pedicellariae, madreporite,...Ch. 22 - Prob. 14RQCh. 22 - Give four examples of how echinoderms are...Ch. 22 - What is a major difference in function of the...Ch. 22 - Prob. 17RQCh. 22 - What characteristics do Hemichordata share with...Ch. 22 - Distinguish Enteropneusta from Pterobranchia.Ch. 22 - For Further Thought The phylogenetic placement of...
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- T or F a)Quadrula and Radiatula each have glochidia that are unhooked – this must be a result of convergent evolution (e.g. homoplasy). b)The common ancestor of Parreysiinae mussels definitely had 'Unhooked' glochidia. c)Note that Mytilus, Mercenaria, and Neotrigonia are mussels that do not have glochidia larvae - they still have larvae, but they are distinct from the other taxa in this tree. Given this, it is unlikely that the common ancestor of all mussel taxa represented in this tree had glochidia larvae.arrow_forwardCyclostomes are often thought as of as “primitive” because they lack jaws. In what ways could the heads of cyclostomes be considered to be derived in their own way?arrow_forwardMatch the description given with either protostome or deuterostome or neither 1)spiral cleavage 2)blastopore becomes the anus 3)schizocoelous coelom formation 4)indeterminate cleavage 5)determinate cleavage 6)blastopore becomes the primitive streak 7)radial cleavage 8)enterocoelous coelom formationarrow_forward
- A) Draw a phylogenetic tree for the major phyla of the animal kingdom. Label the appropriate branch points on the tree with the following features: Tissue, radial symmetry, bilateral symmetry, body cavity, deuterostomes, and protostomes. B). Draw a diagram of a hydra. On the hydra, label the mouth (hypostome), tentacles, basal disk, ovary, budding polyp, gastrovascular cavity. State the function of each structure you labeled next to or under your diagram.arrow_forwardDifferentiate between Phylum Porifera and Clade Eumetazoa. -Poriferans are only haploid during their life cycle, whereas eumetazoans are diploid with haploid sex cells at various stages of their life cycle. -Poriferans have mobile gametes while eumetazoans do not. -Poriferans invert during their development whereas eumetazoans do not invert at any time during their life cycle. -The various cells types of Poriferans do not form permanent associations into true tissues during their life cycle, whereas Eumetazoa possess true, stable tissues. -Poriferans have only one kind of cell during their life cycle whereas Eumetazoa have many kinds of cells throughout their life cycle.arrow_forwardWhy and how do you think the phenomenon of periodicity in filiarial worms evolved?arrow_forward
- Only eight species of lobe-finned fishes are alive today, remnants of a group that flourished in the Devonian period of the Paleozoic era. What morphological characteristics distinguish lobe-finned fishes? What is the literal meaning of Sarcopterygii, the taxon comprising lobe-finned fishes and tetrapods?arrow_forward2) Identify the synapomorphies that unite the non-bilaterian phyla, as well as the protostome phyla, and the deuterostome phyla 3) Characterize each phylum of non-bilaterian and protostome phyla with their synapomorphies and differencesarrow_forwardIn which of the following option, genus, characters and its class/phylum are incorrectly matched? Genus Characters Class/ Phylum Presence of wings (a) |(1)Corvus Aves Air sacs connected to |(b) lungs Distinct male and (a) female |(2)Wuchereria Aschelminthes (b) Internal fertilization Presence of two pairs of |(a) limbs (3)Hyla Amphibia |(b)Body is divisible into head and trunk (a) Lives in fresh water |(4)Lamprey Chondrichthyes (b)Cold blooded animalarrow_forward
- does the earthworm (Oligochaeta) contain any synapomorphies?arrow_forwardTriops evolved 350 million years ago and its morphology has not changed much throughout time. Why do you think this? Explain.arrow_forwardWhat is the role of segmentation and tagmatization in the evolutionary success of the arthropods?arrow_forward
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