BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Chapter 23, Problem 3SA
Summary Introduction
Introduction:
The environment is composed of a variety of organisms. Animals are the most complex living organisms. They are eukaryotes as they contain a well-defined nucleus enclosed in a nuclear membrane. Animals do not contain a cell wall and they cannot prepare food. All animals are heterotrophs as they depend on other organisms for their food. Coelom is present in some types of animals.
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Bivalves, cephalopods, and gastropods are alla. arthropods.b. lophophorans.c. cnidarians.d. annelids.e. molluscs.
Unlike other coelomate animal phyla, mollusks lacka. segmentation.b. cephalization.c. three primary tissue layers.d. some type of body cavity.
whihc of the following arthropod regions does not bear legs
a) cephalothorax
b) abdomen
c) all of the above
d) trunk
e) thorax
Chapter 23 Solutions
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Ch. 23 - An ______ develops from a two-layer embryo. a. sea...Ch. 23 - A great adaptive radiation of animals that...Ch. 23 - Prob. 3SACh. 23 - Prob. 4SACh. 23 - Prob. 5SACh. 23 - Prob. 6SACh. 23 - Prob. 7SACh. 23 - Prob. 8SACh. 23 - The ______ include the only winged invertebrates....Ch. 23 - Prob. 10SA
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- Flatworms, annelids, and roundworms are all______ . a. arthropods c. protostomes b. aceolomate d. radially symmetricalarrow_forwardWhich word-part is not defined correctly? A. echino = radial B. pod = foot C. arthro = jointed D. phore = having/bearing E. cephalo = head 12arrow_forwardSegmentation, first seen in annelids, allows evolutionary advantages bya. allowing more fluid movement for less energy expense.b. specialization of segments to carry out different functions.c. allowing coelom development.d. concentrating sensory and nervous tissues and organs in the direction of motion.arrow_forward
- The pericardial cavity forms froma. evagination of the early digestive tract.b. the neural tube.c. the coelom.d. the branchial arches.e. pharyngeal pouches.arrow_forwardDistinguish between (a) radial and bilateral symmetry; (b) blastula andgastrula; (c) direct and indirect development; (d) complete andincomplete digestive tracts; (e) coelom and pseudocoelom.arrow_forwardWhich statement is not true? A. Snails have radula B. Chitons are annelids C. Terrestrial slugs have a big hole on the side of their neck used for breathing D. Most clams catch algae on gillsarrow_forward
- You find a worm and discover that it has no coelom, no nephridia and a mouth but no anus. What must be true of this animal? A. it is a xenacoelomorph B. it is s pseudocoelomate C. it is hermaphroditic D. it exhibits bilateral symmetry E. A, C and Darrow_forwardWhich phylum is characterized by animals thathave a segmented body?(A) Cnidaria(B) Platyhelminthes(C) Arthropoda(D) Molluscaarrow_forwardCollar cells (choanocytes) are characteristic of (a) poriferans (b) cnidarians (c) most coelomates (d) lophotrochozoans (e) ecdysozoansarrow_forward
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