CAMPBEL BIOLOGY:CONCEPTS & CONNECTIONS
10th Edition
ISBN: 9780136538820
Author: Taylor
Publisher: INTER PEAR
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Chapter 18, Problem 7TYK
Summary Introduction
Introduction:
Ecdysozoa is a superphylum that includes two groups: the arthropods and the nematodes. The word Ecdysozoa comes from the word ecdysis. The term ecdysis means the periodic shedding or molting of exoskeleton as the animal grows. This trait of ecdysis forms the basis of grouping nematodes and arthropods in Ecdysozoa.
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Students have asked these similar questions
If chaetognaths belong to Lophotrochozoa, they would be more closely related to animals like earthworms which have a trochophore larva. If they belong to
Ecdysozoa, they would...
A. Be more closely related to animals that have a lophophore feeding structure
B. Be more closely related to animals that are diploblastic
C. Be more closely related to animals without symmetry
D. Be more closely related to animals that shed their outer cuticle
E. Both B and D are true
O A
O B
O C
O D
O E
Distinguish the following phyla by their characteristics and features. Give a specific example for each.
A. Poriferans
B. Cnidarians
C. Coelenterates
Serial segmentation is a key characteristic of which of the following phyla?
a. Mollusca
b. Brachiopoda
c. Bryozoa
d. Annelida
Chapter 18 Solutions
CAMPBEL BIOLOGY:CONCEPTS & CONNECTIONS
Ch. 18 - Prob. 1CCCh. 18 - Identify the pattern of embryonic development...Ch. 18 - Bilateral symmetry in animals is best correlated...Ch. 18 - Jon found an organism in a pond, and he thinks its...Ch. 18 - Which of the following groupings includes the...Ch. 18 - Which of the following animal groups does not have...Ch. 18 - Prob. 7TYKCh. 18 - Prob. 8TYKCh. 18 - Prob. 9TYKCh. 18 - Prob. 10TYK
Ch. 18 - The simplest animal group a. annelids b. nematodes...Ch. 18 - Prob. 12TYKCh. 18 - Largest phylum of all a. annelids b. nematodes c....Ch. 18 - Closest relatives of chordates a. annelids b....Ch. 18 - Prob. 15TYKCh. 18 - Prob. 16TYKCh. 18 - Prob. 17TYKCh. 18 - Name two phyla of animals that are radially...Ch. 18 - One of the key characteristics of arthropods is...Ch. 18 - A marine biologist has dredged up an unknown...Ch. 18 - SCIENTIFIC THINKING In one of the experiments...
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- Nematodes and nematomorphs have which type(s) of skeletal system? a.) Endoskeleton b.) Endoskeleton and hydrostatic skeleton c.) Endoskeleton and exoskeleton d.) Exoskeleton and hydrostatic skeleton e.) Exoskeleton f.) Hydrostatic skeletonarrow_forwardWhich of the following statements is NOT true regarding protostome diversity? A. Of the 30 animal phyla, more than 2/3 (22 phyla) are protostomes. B. There are more mollusk species than Priapula. C. There are more lophotrochozoans than ecdysozoans. D. A major feature distinguishing different developmental characteristics.arrow_forwardChoose which is FALSE among the following statements about the Phylum Annelida. A. Annelids have thin cuticle that is NOT made of chitin. B. Earthworms are segmented worms, either externally or internally. C. Leeches are segmented. D. Annelids are lophotrochozoans because of their presence of lophophores. E. Annelids are triploblastic and eucoelomates. Choose which is FALSE among the following statements about the different classes of the annelids. * A. Oligochaetes have few setae, while polychaetes have many. B. Oligochaetes are mainly terrestrial, while polychaetes are mainly aquatic. C. Oligochaetes have uniramous parapodia, while polychaetes have biramous. D. Both the Oligochaetes and Hirudineans have clitellium. E. Oligochaetes and Hirudineans are hermaphrodites, while Polychaetes have separate sexes.arrow_forward
- Describe the following general characteristics that can be used to distinguish among Animal phyla: Which of the three groups of Bilateria are they in? What's their body plan (Symmetry? Tissues? Gut? Coelom?) a. Mollusca b. Arthropoda c. Echinodermata . List representatives of the four most abundant groups of echinoderms: d. Chordataarrow_forwardWhich of the following is not a member of the phylum Chordata? a. Cephalochordata b. Echinodermata c. Urochordata d. Vertebrataarrow_forwardFlatworms can reach a maximum size of around 40cm. Whilst this is big for a worm, there are certainly larger animals on earth. What might it be that restricts the flatworms body size? A. They have an exoskeleton that restricts their growth. B. They do not have a circulatory system. C. They are exothermic animals that have limited energy for growth. D. They are acoelomates and so the growth of their internal organs is restricted by growth of the outer body wall.arrow_forward
- To which of the following groups would a species that does not molt, possesses a coelom, and has a trochophore larva belong? a. Ecdysozoa b. Parazoa c. Platyzoa d. Lophotrochozoaarrow_forwardWhich of the following classes of arthropod possess chelicerae? a. Chilopoda b. Crustacea c. Hexapoda d. Chelicerataarrow_forwardThe larval stage of a cnidarian is known as a a. medusa. b. planula. c. polyp. d. cnidocyte.arrow_forward
- Which of the following descriptions or features does/do NOT apply to Phylum Nematoda? a. Chitinous cuticle b. Sensory papillae c. Pseudocoelomate d. None among the other choices e. All of the other choices (except "None among....") f. Ecdysozoan g. Hydrostatic skeletonarrow_forwardWhile studying the embryonic development of an organism, you determine that the blastopore of the developing gastrula has developed into a mouth. Based on the Animalia tree discussed in class, which one of the following phyla could this NOT be? A. Chordata B. Mollusca C. Porifera D. Annelida E. Arthropodaarrow_forwardWhich of the following features does not distinguish humans as a member of phylum Chordata? a. Human embryos undergo indeterminate cleavage. b. A spinal cord runs along an adult human’s dorsal side. c. Human embryos exhibit pharyngeal arches and gill slits. d. The human coccyx forms from an embryonic tail.arrow_forward
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