Questions and Answers
Which of the following statements is false?
Which of the following statements about the anatomy of a mollusk is false?
The digestive system includes a gizzard, a stomach, a digestive gland, and the intestine.
Which of the following statements about insects is false?
The trachea is part of the digestive system.
Mesohyl contains:
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The large central opening in the parazoan body is called the:
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What is a key limitation of sponge body plans?
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Cnidocytes are found in
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Cubozoans are
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To which class does a sessile Cnidarian that buds medusas belong?
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Which group of flatworms are primarily ectoparasites of fish?
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The rhynchocoel is a
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Annelids have:
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A mantle and mantle cavity are present in:
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How does segmentation enhance annelid locomotion?
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The embryonic development in nematodes can have up to __________ larval stages.
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The nematode cuticle contains _____.
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Crustaceans are _____.
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Flies are_______.
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Which of the following is not a key advantage provided by the exoskeleton of terrestrial arthropods?
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Echinoderms have _____.
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The circulatory fluid in echinoderms is _____.
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Which of the following features does not distinguish humans as a member of phylum Chordata?
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The sister taxon of the Chordata is the _____.
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Study Notes
Sponges
- Choanocytes possess flagella to propel water through the sponge's body.
- Pinacocytes do not have the ability to transform into any cell type.
- Porocytes regulate water flow through the sponge's pores.
- Mesohyl is a gelatinous substance containing collagen and various cells for sponge functions.
- The osculum is the large central opening in a sponge's body.
- Sponge body plans are variations of a tube-within-a-tube design, limited by reliance on osmosis and diffusion, necessitating a high surface area to volume ratio.
Cnidarians
- Cnidocytes are specialized cells found in the Phylum Cnidaria.
- Cubozoans exhibit polymorphism within their life cycle.
- The Class Scyphozoa includes sessile Cnidarians that produce medusas, which swim by contracting muscle rings in their bells.
Flatworms
- Monogeneans, a group of flatworms, primarily act as ectoparasites of fish.
Nematodes
- Nematodes can undergo up to four larval stages during embryonic development.
- Their cuticle is composed of chitin, providing structural support.
Annelids
- Annelids feature a true coelom, enhancing bodily compartmentalization and function.
- Segmentation allows for localized muscle contractions, facilitating coordinated locomotion.
Mollusks
- Mollusks possess a mantle and a mantle cavity which play essential roles in their physiology.
Arthropods
- Crustaceans belong to the Ecdysozoans clade and undergo molting.
- Flies are classified as hexapods with six limbs.
- Terrestrial arthropods' exoskeletons provide many advantages, but they do not grow consistently with the organism throughout its life.
Echinoderms
- Echinoderms are characterized by pentaradial symmetry.
- Their circulatory system relies on water as the circulatory fluid.
Chordates
- Humans are classified within the phylum Chordata; however, the feature of indeterminate cleavage in embryos does not distinguish them as part of this group.
- The sister taxon to Chordata is the Ambulacraria.
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Description
Test your knowledge on invertebrates covered in Biology Chapter 28. This quiz includes questions about the anatomy and characteristics of various invertebrate phyla, such as sponges and mollusks. Challenge yourself with true or false statements about their structure and function.