Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 24, Problem 3SQ
Summary Introduction
Concept introduction: The development of bilaterally symmetrical animals is of two types: protostomes and deuterostomes. Most of the bilaterally symmetrical invertebrates fall under the protostomes category.
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Bivalves, cephalopods, and gastropods are alla. arthropods.b. lophophorans.c. cnidarians.d. annelids.e. molluscs.
Segmentation, 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.
Unlike other coelomate animal phyla, mollusks lacka. segmentation.b. cephalization.c. three primary tissue layers.d. some type of body cavity.
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Biology: The Unity and Diversity of Life (MindTap Course List)
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- Annelids and_______ have a closed circulatory system. a. insects c. flatworms b. cephalopods d. sea starsarrow_forwardAmong living animals, only birds have ________. a. a cloaca c. feathers b. a four-chambered heart d. amniote eggsarrow_forwardWhich of the following is NOT a characteristic of annelids? A.they have a closed circulatory system B.they reproduce through sexual reproduction C.there are both male and female earthworms D.they are able to sense vibrations in the groundarrow_forward
- Flatworms, annelids, and roundworms are all______ . a. arthropods c. protostomes b. aceolomate d. radially symmetricalarrow_forwardYou 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_forwardLobe-finned fishes are important because theya. were the first vertebrates.b. were the earliest animals.c. are closely related to tetrapods.d. lack jawsarrow_forward
- An animal whose blastopore develops into a mouth and the second opening into the anus can be called ______. Question 6 options: a) acoelomate b) bilaterally symmetrical c) a protostome d) a deuterostomearrow_forwardA body cavity fully lined with tissue derived from mesoderm is called a______ . a. coelom c. complete digestive tract b. pseudocoelom d. gastrovascular cavityarrow_forwardReptiles are much more extensively adapted to life on land than amphibians because reptiles a. have a complete digestive tract. b. lay eggs that are enclosed in shells. c. are endothermic. d. go through a larval stage.arrow_forward
- A major difference between birds and other reptiles is that birdsa. produce a shelled egg. d. care for their young.b. are ectotherms. e. have air sacs.c. are tetrapods.arrow_forwardArthropods are the first phyla to possess: A)a brain B)an exoskeleton C)a complete digestive system D) an endoskeleton E) gillsarrow_forwardBoth cartilaginous and bony fishes have______ . a. jaws d. a swim bladder b. a bony skeleton e. a four-chambered heart c. lungs f. all of the abovearrow_forward
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