CAMPBELL BIOLOGY,VOL.II >CUSTOM<
17th Edition
ISBN: 9781323803677
Author: Urry
Publisher: PEARSON
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Textbook Question
Chapter 33.3, Problem 3CC
MAKE CONNECTIONS Ø Explain how the molluscan foot in gastropods and the excurrent siphon in cephalopods represent examples of descent with modrfication (see Concept 22.2).
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Briefly describe characteristics of the hypothetical ancestral mollusc, and tell how each class of molluscs (Caudofoveata, Solenogastres, Polyplacophora, Monoplacophora, Gastropoda, Cephalopoda, Bivalvia, Scaphopoda) differs from the ancestral condition with respect to each of the following: shell, radula, foot, mantle cavity and gills, circulatory system, and head.
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.Compare the locomotory mechanism between the gastropods and cephalopods in terms of structure.
Chapter 33 Solutions
CAMPBELL BIOLOGY,VOL.II >CUSTOM<
Ch. 33.1 - Prob. 1CCCh. 33.1 - Prob. 2CCCh. 33.2 - Compare and contrast the polyp and medusa forms of...Ch. 33.2 - VISUAL SKILLS Use the cnidarian life cycle...Ch. 33.2 - MAKE CONNECTIONS Many new animal body plans...Ch. 33.3 - Prob. 1CCCh. 33.3 - Prob. 2CCCh. 33.3 - MAKE CONNECTIONS Explain how the molluscan foot...Ch. 33.4 - Prob. 1CCCh. 33.4 - Describe two adaptations that have enabled insects...
Ch. 33.4 - MAKE CONNECTIONS Historically, annelids and...Ch. 33.5 - Prob. 1CCCh. 33.5 - WHAT IF? The insect Drosophila melanogaster and...Ch. 33.5 - MAKE CONNECTIONS Describe how the features and...Ch. 33 - Lacking tissues and organs, how do soonges...Ch. 33 - Describe the cnidarian body plan and its two major...Ch. 33 - is the lophotrochozoan clade united by unique...Ch. 33 - Describe some ecological roles of nematodes and...Ch. 33 - You've read that echinoderms and chordates are...Ch. 33 - A land snail, a clam and an octopus all share...Ch. 33 - Prob. 2TYUCh. 33 - The water vascular system of echinoderms (A)...Ch. 33 - Prob. 4TYUCh. 33 - In Figure 33.2, which two main clades branch from...Ch. 33 - MAKE CONNECTIONS In Figure 33.8, assume that the...Ch. 33 - Evolution connection Interpret thf data Draw a...Ch. 33 - Prob. 8TYUCh. 33 - Prob. 9TYUCh. 33 - SYNTHESIZE YOUR KNOWLEDGE Colleclively, do these...
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- Q30: Match the all parts to this question, the answer choices are shown in the picturearrow_forwardClass Gastropoda and Class Bivalvia independently evolved modifications to their body plan that allowed them to invade sandy and muddy habitats, burying their bodies under the surface and accessing the surface via siphons. For an example organism in each Class, (1) draw a diagram showing the morphological modifications and (2) write a description of how this organism had evolved from the hypothetical ancestral mollusk (HAM) body plan.arrow_forwardExplain the function of nematocysts in cnidarians.arrow_forward
- 1. Define sessile. Name an invertebrate with a sessile adult stage. 2. Sponges have specialized cells called collar cells. Describe how collar cells are specialized for the functions they serve. 3. What is a nematocyst? What is its function? 4. How do coral reefs form? 5. How do free-living nematodes contribute to the carbon cycle? 6. Describe the basic body plan of a mollusk. 7. What are gills? What is their function?arrow_forwardMatching: (23-27) Match the specialized cell/organ to its function: 23 Colloblast 24. Choanocyte 25 Spicule 26. Osculum 27) Cnidocyte A. structural support B. water exits sponge here C. stinging cell with poison barb D. sticky cell to capture food E. filters food out of water in spongesarrow_forwardQ27: Select all that applyarrow_forward
- Explain pore canals in cockroaches.arrow_forwardGrantia Sponge Are the radial canals and the spongeocoel connected or seprate? IS the spongeocel a true coelom, a pseudocoelm, or neither? What is the direction of water flow in the sponge and are they multicellular? What functions do each of the different kinds of cells have? Are they diploblastic,triploblastic, or neither?arrow_forwardMAKE CONNECTIONS Historically, annelids and arthropods were viewed as closely related because both havebody segmentation. Yet DNA sequence data indicatethat annelids belong to one clade (Lophotrochozoa) andarthropods to another (Ecdysozoa). Could traditionaland molecular hypotheses be tested by studyingthe Hox genes that control body segmentation (seeConcept 21.6)? Explain.arrow_forward
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