Chapter 23—ANIMALS I:
MAJOR INVERTEBRATE
GROUPS
EXAM STUDY GUIDE
UPDATED 2024/2025
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Chapter 23—ANIMALS I: MAJOR INVERTEBRATE GROUPS EXAM STUDY GUIDE UPDATED 2024/2025, Exams of Geography
This study guide covers key concepts related to animal evolution, focusing on major invertebrate groups. It includes multiple-choice questions with answers and references to specific sections within the textbook. The guide is designed to help students prepare for an exam on animal diversity and evolution.
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2023/2024
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Chapter 23—ANIMALS I:
MAJORINVERTEBRATE
GROUPS
EXAM STUDY GUIDE
UPDATED 2024/
The Best Study Notes
INVERTEBRATE GROUPS
EXAM STUDY GUIDE UPDATED
Figure 23.1 Proposed evolutionary tree.
- According to the accompanying evolutionary tree for major animal groups, which letter represents the animals whose first embryonic opening is the mouth? a. A b. B c. C d. D e. E ANSWER: d POINTS: 1 REFERENCES: Section 23.1 How have animal body plans evolved? KEYWORDS: Bloom's: Apply NOTES: New
- At which branch in the accompanying figure did bilateral symmetry evolve? a. A b. B c. C d. D e. E ANSWER: c POINTS: 1 REFERENCES: Section 23.1 How have animal body plans evolved? KEYWORDS: Bloom's: Apply
INVERTEBRATE GROUPS
EXAM STUDY GUIDE UPDATED
e. E ANSWER: b POINTS: 1 REFERENCES: Section 23.1 How have animal body plans evolved? KEYWORDS: Bloom's: Apply NOTES: New
- At which point in the accompanying figure did animals have cells organized as tissues? a. A b. B c. C d. D e. E ANSWER: a POINTS: 1 REFERENCES: Section 23.1 How have animal body plans evolved? KEYWORDS: Bloom's: Apply NOTES: New
- Animals with bilateral symmetry typically undergo an evolutionary process whereby many nerve cells and sensory structures become concentrated at the front of the body. What is this process called? a. segmentation b. cephalization c. coelom formation d. pupation e. radiation ANSWER: b POINTS: 1 REFERENCES: Section 23.1 How have animal body plans evolved? KEYWORDS: Bloom's: Apply NOTES: New
- The vast majority of animals are: a. mammals b. invertebrates c. vertebrates d. birds
INVERTEBRATE GROUPS
EXAM STUDY GUIDE UPDATED
e. predators ANSWER: b POINTS: 1 REFERENCES: Section 23.1 How have animal body plans evolved? KEYWORDS: Bloom's: Remember
- An animal with bilateral symmetry:
INVERTEBRATE GROUPS
EXAM STUDY GUIDE UPDATED
c. a one-way tube, a mouth, and an anus d. radula e. a two way sac-like cavity ANSWER: c POINTS: 1 REFERENCES: Section 23.1 How have animal body plans evolved? KEYWORDS: Bloom's: Remember
INVERTEBRATE GROUPS
EXAM STUDY GUIDE UPDATED
- Which statement most accurately describes the deuterostomes? a. The first opening on the embryo surface becomes the mouth. b. Their food and wastes enter/exit through the same body opening. c. They have an incomplete digestive system. d. They all have radial symmetry. e. Their mouth develops from the second embryonic opening and the first opening becomes the anus. ANSWER: e POINTS: 1 REFERENCES: Section 23.1 How have animal body plans evolved? KEYWORDS: Bloom's: Understand
- A major explosion of animal diversity in which all major marine lineages were formed took place during which period? a. Cambrian b. Carboniferous c. Devonian d. Permian e. Proterozoic ANSWER: a POINTS: 1 REFERENCES: Section 23.2 Animal origins and early radiations KEYWORDS: Bloom's: Remember NOTES: Modified
- The protist that is most closely related to animals is the: a. amoeba b. choanoflagellate c. dinoflagellate d. euglenoid e. paramecium ANSWER: b POINTS: 1 REFERENCES: Section 23.2 Animal origins and early radiations KEYWORDS: Bloom's: Remember
- Which group of tiny marine organisms have the simplest body and smallest genome of all modern animals? a. sponges
INVERTEBRATE GROUPS
EXAM STUDY GUIDE UPDATED
REFERENCES: Section 23.2 Animal origins and early radiations KEYWORDS: Bloom's: Remember NOTES: New
- The function of the collar cells of sponges function is to: a. secrete a matrix that supports the body of the sponge b. filter and engulf food c. digest food d. produce eggs and sperm e. attach the sponge to a solid surface ANSWER: b POINTS: 1 REFERENCES: Section 23.3 Sponges KEYWORDS: Bloom's: Remember
- Which animal group does not have tissues? a. nematodes b. sponges c. echinoderms d. flatworms e. cnidarians ANSWER: b POINTS: 1 REFERENCES: Section 23.3 Sponges KEYWORDS: Bloom's: Remember
- A typical sponge is because it produces. a. a hermaphrodite; only egg cells b. parthenogenetic; both egg and sperm cells c. a hermaphrodite; both egg and sperm cells d. parthenogenetic; only egg cells e. a hermaphrodite; only sperm cells ANSWER: c POINTS: 1 REFERENCES: Section 23.3 Sponges KEYWORDS: Bloom's: Remember
INVERTEBRATE GROUPS
EXAM STUDY GUIDE UPDATED
- Unlike most other animals, sponges lack which of the following? a. a digestive tract only b. a symmetrical body plan only c. tissues only d. a digestive tract and a symmetrical body plan only e. a digestive tract, a symmetrical body plan, and tissues ANSWER: e
INVERTEBRATE GROUPS
EXAM STUDY GUIDE UPDATED
REFERENCES: Section 23.4 What are cnidarians? KEYWORDS: Bloom's: Understand OTHER: Selecting the Exception
- Four of the five answers listed below are descriptive of annelids. Select the exception. a. closed circulatory system b. fluid-filled coelom
INVERTEBRATE GROUPS
EXAM STUDY GUIDE UPDATED
c. jointed appendages d. segmented body e. tubular gut ANSWER: c POINTS: 1 REFERENCES: Section 23.6 What are annelids? KEYWORDS: Bloom's: Remember OTHER: Selecting the Exception
- Four of the five answers listed below are molluscan body features. Select the exception. a. gills b. head and foot c. mantle d. conspicuous segmentation e. radula ANSWER: d POINTS: 1 REFERENCES: Section 23.7 What are mollusks? KEYWORDS: Bloom's: Understand OTHER: Selecting the Exception
- Four of the five answers listed below are arthropods. Select the exception. a. barnacles b. bumblebees c. spiders d. octopus e. ticks ANSWER: d POINTS: 1 REFERENCES: Section 23.10 What are the main kinds of arthropods? KEYWORDS: Bloom's: Remember OTHER: Selecting the Exception NOTES: Modified
- Four of the five answers listed below are members of a common group. Select the exception. a. sea star b. sea anemone
INVERTEBRATE GROUPS
EXAM STUDY GUIDE UPDATED
OTHER: Selecting the Exception
- Four of the five answers are features of the echinoderms. Select the exception. a. spiny skin b. decentralized nervous system c. radial symmetry d. a water-vascular system e. a mantle ANSWER: e POINTS: 1 REFERENCES: Section 23.12 What are echinoderms? KEYWORDS: Bloom's: Remember NOTES: Modified
- Nematocysts in cnidarians are: a. reproductive cells b. excretory organs c. sets of muscle cells d. circulatory cells e. defensive cells ANSWER: e POINTS: 1 REFERENCES: Section 23.4 What are cnidarians? KEYWORDS: Bloom's: Remember NOTES: Modified
- Cnidarians have an outer layer derived from ectoderm, an inner layer from endoderm, and a. a. middle layer of mesoderm b. watery middle layer c. well-developed brain d. jellylike matrix in between e. complete gut ANSWER: d POINTS: 1 REFERENCES: Section 23.4 What are cnidarians? KEYWORDS: Bloom's: Remember NOTES: New
INVERTEBRATE GROUPS
EXAM STUDY GUIDE UPDATED
- Where are nematocysts located on a cnidarian’s body? a. on lid cells b. in a cnidocyte c. on the base of polyps d. around the ectodermal outside of the body e. on mesoderm cells
INVERTEBRATE GROUPS
EXAM STUDY GUIDE UPDATED
POINTS: 1
REFERENCES: Section 23.4 What are cnidarians? Section 23.5 What is a flatworm? KEYWORDS: Bloom's: Remember NOTES: check this
- How do marine polychaetes use chitin hardened body parts?
INVERTEBRATE GROUPS
EXAM STUDY GUIDE UPDATED
a. as an excretory organ b. the chitin hardened tentacles, to move sand c. to chew and digest prey d. the chitin-hardened jaws, to capture prey e. the chitin-reinforced bristles, for movement and chitin hardened jaws to capture prey ANSWER: e POINTS: 1 REFERENCES: Section 23.5 What are annelids? KEYWORDS: Bloom's: Understand NOTES: New
- Which characteristics best describe earthworms? a. polychaete; fluid filled coelom b. oligochaete; open circulatory system c. moves by only longitudinal muscle contraction and hydrostatic skeleton d. oligochaete; scavengers; closed circulatory system e. hermaphrodites that fertilize themselves; closed circulatory system ANSWER: d POINTS: 1 REFERENCES: Section 23.5 What are annelids? KEYWORDS: Bloom's: Understand NOTES: New
- A closed circulatory system is seen in: a. leeches only b. roundworms only c. flatworms only d. cnidarians only e. both earthworms and leeches ANSWER: e POINTS: 1 REFERENCES: Section 23.5 What are annelids? KEYWORDS: Bloom's: Remember NOTES: Modified
- A scolex is: a. the anterior attachment organ of a tapeworm