Exam 3 Test Pool

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Jun 12, 2024

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Exam 3 Test Pool Chapter 32 1. As a teaching assistant, you must gather examples of deuterostomes from a large, unorganized selection of animals. Which specimens should you select? (Check all that apply.) 2. Damage to its flagellum would prevent a choanocyte from 3. Of the following features, which is the most widely shared in the animal kingdom? 4. A scientist is studying some developing eggs from an ocean sample. The early embryos have divided only a few times, and all cells look identical. When the scientist carefully removes half the cells from an embryo, both clumps of cells are able to complete development, forming twins. The eggs can be identified as 5. As a teaching assistant, you are grading lab reports and notice that in a sketch of a cross-section of a roundworm, a student labeled the space between the inner lining of the body wall and the wall of the digestive cavity as the coelom. How should you grade this label? 6. Given the distribution of the animal phyla across the Earth's various ecosystems, what would be the most likely habitat for the origin of animals? 7. Of the following combination of statements about protostomes and deuterostomes, which choice is correct? 8. Protostomes develop through 9. A biologist discovered a new animal. Upon studying its embryonic development, she observed radial cleavage with the blastopore developing into an anus. This animal was categorized as a 10. Solid worms that lack a body cavity are known as 11. Which of the following terms is mismatched with its meaning or characteristics? 12. What are the three animal phyla that dominate animal life on land? 13. Although it is recognized that segmentation is more widespread than previously thought, traditionally segmentation was said to be found in 14. Molecular data confirm that cnidarians branched off from the rest of animals before _________ evolved. 15. Parazoa… 16. Which one of the following terms applies to the phylum Arthropoda? 17. Which one of the following terms applies to the phylum Mollusca? 18. Which one of the following terms applies to the phylum Platyhelminthes? 19. Which one of the following terms applies to the phylum Nematoda? 20. Which one of the following terms applies to the phylum Cnidaria? 21. Select the phylum that includes deuterostome animals that are exclusively marine and have radial symmetry as adults. 22. Which one of the following terms applies to the phylum Bryozoa? 23. Select the following phylum that includes coelomate, bilaterian animals that have a structure called a notochord. 24. Select the following phylum that includes animals that are unsegmented, acoelomate, and have a digestive cavity with a single opening. 25. Which one of the following features is unique to animals? 26. Predict what would occur if the nematocysts of a cnidarian were no longer able to function. 27. A member of your study group is unfamiliar with cnidarians and is struggling with understanding the difference between cnidarian polyps and medusae. How can you help your classmate to grasp the difference? Check all of the correct statements.

Chapter 33 1. At a celebratory dinner for a recent publication, a marine biologist ordered the lobster claw appetizer. What part did she order? 2. A collection of arthropods is sitting in the lab prep room, and as a teaching assistant, you must select a hexapod from this diverse group of specimens to show your class. Which characteristic will quickly make you certain that what you have selected is a hexapod? 3. Barnacles are sessile filter feeders but unlike bivalves, they have internal fertilization. How do they solve this problem? 4. An entomologist observed a locust sitting on a branch pumping its abdomen like an accordion. What is the insect most likely doing? 5. Scorpions have a prosoma, pedipalps that are modified into claws, and chelicerae. Which taxonomic group are they a member of? 6. The lophophore of a brachiopod serves the same function as the _________ in a bivalve. 7. How would an earthworm stretch its body to reach a patch of dirt after crossing a hot sidewalk? 8. Pinworm is a nematode parasite that lives in the human rectum, and causes itching in the anal area. What best explains the itching symptom? 9. How could a paleontologist distinguish between a bryozoan fossil and a brachiopod fossil? 10. What would result if a leech had a mutation causing it to secrete low levels of anticoagulants? 11. Inside its beak, an octopus has a rasping tongue that is used to tear apart food. Which gastropod structure is this analogous to? 12. What is a simple way for determining if an annelid is a member of Errantia (a polychaete) or Sedentaria (a clitellate)? 13. Interoctopus communication is facilitated by 14. Humans have direct development, a closed circulatory system, well-developed eyes, and large brains. Which mollusk also shares these features? 15. A snail in your garden and an oyster are quite different in appearance. What would be evidence to justify grouping them together? 16. What change would result for a land snail that had a mutation interfering with chitin formation? 17. Paramecia use cilia for locomotion and for gathering organic matter. How are rotifers similar? 18. Why doesn't a tapeworm have a mouth on its scolex? 19. The phylum that includes snails, clams, oysters, and octopuses is the 20. In mollusks, the folds of tissue that arise from the dorsal body wall and enclose a cavity surrounding the visceral mass are called the 21. Many marine mollusks have distinctive larvae which have their bodies encircled by a row of cilia. These larvae are called 22. The organ that is responsible for secreting cocoons in earthworms is known as the 23. The Bryozoa and Brachiopoda have which feature in common? 24. Examples of mollusks that live on land are the 25. Squids and octopuses move by means of water movement through their 26. The nitrogenous waste in mollusks is removed by

27. Trochophores, the free-swimming larvae of many mollusks, are propelled through the water by 28. Radula modification allowed all of the following functions in gastropods except 29. Which of the following organs of cephalopods resemble those of the vertebrates? 30. The partitions that separate the segments of the annelid body are known as 31. Annelids possess all of the following except 32. Each segment of an annelid typically contains bristles of chitin called 33. The sexual reproduction of earthworms characteristically is 34. Earthworms show all of the following features except 35. The medicinal leech, once used to withdraw "unhealthy" blood from patients, produces _________ to ensure blood flow from the host? 36. A biologist has been studying a mollusk that does not have a shell. It lives in the marine environment. Of the examples given below, which one did the biologist study? 37. All of the following are either structures or characteristics of members of the Class Bivalvia of the Phylum Mollusca except 38. Select the mismatched pair of Phylum Mollusca classes and their examples. 39. A marine biologist visits your biology class and begins his talk entitled, "Life as a Trochophore." A friend seated next to you asks, "What is a trochophore?" You explain that a trochophore is 40. The evolutionary innovation that first appeared in arthropods and is characteristic of the most successful of all animal groups is that of 41. In terms of the number of species, the most successful class of arthropods is 42. In some arthropods, tagmatization has produced a combination of head and thorax known as a 43. The passage of an arthropod through stages from egg to adult is 44. Nauplius, a unique kind of larva, is characteristic of 45. The rigid chitinous exoskeleton of an arthropod has all of the following functions except it 46. Compound eyes are composed of independent visual units called 47. Eyes with single lenses that respond to light and darkness are found in many arthropods; these are the 48. Air passage into the trachea of most insects is controlled by the closing and opening of valves, which operate special openings called 49. The excretory structures of terrestrial arthropods are slender projections from the digestive tract that are attached at the junction of the midgut and hindgut. These are called 50. Chelicerae function as 51. Decapod crustaceans (shrimps, lobsters, and crabs) all lack 52. An invertebrate biologist is conducting research with crabs. Her interest is ecdysis. This implies that she studies 53. A marine biologist makes a presentation about crustaceans to your biology class. He explains that he has recently received an NSF grant to study sessile crustaceans. You are only aware of one group of sessile crustaceans. This crustacean must be 54. Which one of the following incorrectly matches a molluscan structure with its typical function? 55. Which one of the following incorrectly matches a molluscan group with a feature characterizing that group? 56. Which one of the following annelid structures or events is not correctly paired with its role in locomotion? 57. Which one of the following statements about the phylum Brachiopoda is false? 58. Which one of the following insect organ systems has placed the greatest limitation on their body size?

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