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Chapter 07 - Marine Without a Backbone

Chapter 07 Marine Animals Without a Backbone

Multiple Choice Questions

1. Animals, all members of the Animalia, are characterized by all of the following except one: A. They can be eukaryotic and mutlicellular. B. Most are multicellular. C. Some are autotrophs. D. Some lack a backbone. E. Some are eukaryotic and unicellular.

2. Which of the following type of cells and structures of does not match the function? A. Collar cells — calcareous structures for support B. Osculum — opening through which water leaves C. Pore cells — opening through which water enters D. Spongin — fibers for support E. Gametes — reproduction

3. All sponges share only one of these features: A. They are all marine. B. They reproduce by asexual reproduction only. C. They have specialized circulatory organs. D. They have neumatocysts. E. They are multicellular.

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4. Sponges and all filter feeders use the following as a food source: A. only. B. All particulate matter suspended in water. C. Particulate matter that deposits on the bottom only. D. Dead . E. Vegetable matter only in the water.

5. The larval stage of an is best defined as: A. Immature stage that is able to reproduce. B. Early colony of cells of fresh-water sponges. C. Early stage of development of an organism, typically part of the . D. Sperm that lives free in the water. E. that has been fertilized by more that one sperm.

6. All cnidarians share all of these features except one: A. Nematocysts. B. Multicellular. C. Radial symmetry. D. Complete digestive tract with mouth and anus. E. Marine and fresh-water.

7. An example of an anthozoan is: A. Portuguese-Man-of War. B. Colonial hydroid. C. Sea nettle jellyfish. D. Sea wasp. E. Reef coral.

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8. Most cnidarians are specialized as: A. Filter feeders. B. Parasites. C. Carnivores. D. Plant-feeders. E. Feeders of organic matter on the bottom.

9. Free-floating cnidarians like jellyfish are referred to as having a ______type form. A. Polyp B. Benthic C. Bilateral D. Medusa E. Asexual

10. Comb jellies are: A. Bilaterally symmetrical. B. Similar to a cnidarian polyp. C. Distinguished by eight bands of cilia. D. Colonial animals. E. Carnivores that use nematocysts to capture prey.

11. In a bilaterally symmetrical animal, which of the following is not correctly paired? A. Dorsal surface -upper surface B. Anterior surface - C. Posterior surface -rear end D. Ventral surface -brain

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12. The development of bilateral symmetry in invertebrates has particularly influenced the of a more complex: A. Digestive system. B. Reproductive system. C. Skeleton. D. Mouth. E. Nervous system.

13. Comb jellies are classified as: A. Cnidarians. B. Ctenophores. C. Platyhelminthes. D. Sipunculans.

14. are characterized by having: A. Radial symmetry. B. A . C. used for filter feeding. D. Nematocysts. E. A complete digestive tract.

15. One group of parasites of , seabirds, and other marine animals is: A. Flukes. B. Turbellarians. C. Comb jellies. D. Ribbon worms. E. Segmented worms.

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16. The most distinctive feature of ribbon worms is: A. Long proboscis. B. Segmented body. C. Absence of a digestive tract. D. Long bands of cilia used in locomotion. E. Radial symmetry.

17. Which of the following is not correctly paired? A. -comb jellies B. Phylum Nematoda-round worms C. Phylum Nemertea-ribbon worms D. Phylum Platyhelminthes-beard worms E. Phylum Porifera-sponges

18. A worm is: A. A Platyhelminthes. B. A . C. A Cnidarian. D. An . E. A Fluke.

19. Deposit-feeding animals feed on: A. Blood and living tissues. B. Particulate matter in the water. C. Plankton from the water that passively enters the digestive system. D. Live prey. E. Organic matter that settles on the bottom.

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20. Polychaete worms show: A. A body covered with a mantle. B. Segmentation. C. Radial symmetry. D. Incomplete digestive tract. E. U-shaped gut.

21. Beard worms are unique because they lack: A. Symmetry. B. A skin. C. A digestive tract. D. Cells or tissues. E. A reproductive system.

22. Arrow worms feed on: A. Organic matter that deposits on the bottom. B. Plant matter. C. Nutrients dissolved in the water. D. Live prey. E. Organic matter filtered from the water.

23. A nudibranch is a type of: A. Platyhelminthes. B. Nematode. C. Annelid. D. Cnidarian. E. Mollusc.

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24. All molluscs: A. Have a soft body often covered by a shell made of silica B. Have a soft body covered by a mantle. C. Have an externally segmented body. D. Lack a larval stage. E. Lack a circulatory system.

25. Which of the following are not correctly paired? A. Class -mussels. B. Class -oysters. C. Class Polyplacophora-. D. Class Cephalopoda-octopus.

26. The radula and crystalline style of molluscs are part of their: A. Reproductive system. B. Defensive mechanisms. C. Excretory system. D. Nervous system. E. Digestive system.

27. Which of the following is not an ? A. B. C. Krill D. Barnacle E. Blue crab

28. One distinctive feature of : A. Lack of a digestive system. B. Jointed legs. C. in a mantle cavity. D. Proboscis used to capture prey. E. Lack of a brain.

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29. One of the following is not a : A. Horseshoe crab. B. . C. Barnacles. D. Shrimps. E. Beach hoppers.

30. One distinctive feature of all : A. Jointed legs. B. slits. C. Endoskeleton. D. . E. Bilateral symmetry.

31. Which of the following are not correctly paired? A. Class Asteroidea-sea stars B. Class Holothuroidea-sea cucumbers C. Class Ophiuroidea-brittle stars D. Class Echinoidea-feather stars

32. The term for changing exoskeletons by is: A. undulate. B. molt. C. Byssal secretion. D. Asexual mitosis.

33. Which of the following organisms has a siphon? A. Cnidarians B. Ctenophores C. Nudibranchs D. Cephalopods

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34. A zoea would be a larval form of which of these organisms? A. Mussel B. Octopus C. Barnacle D. Crab

35. Which of these organisms is most highly evolved? A. A B. A C. A D. A

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