INQUIRY INTO LIFE ECOMM
16th Edition
ISBN: 9781265873332
Author: Mader
Publisher: MCG
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Textbook Question
Chapter 31, Problem 9A
Bivalves, cephalopods, and gastropods are all:
- Arthropods
- Lophophorans
- Cnidarians
- Annelids
- molluscs
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The basic body plan of a mollusk is to have a head, foot, and visceral
mass. In the case of the cephalopods, the foot;
Has become part of the digestive system
Has been modified into a beak
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ILLUSTRATE THIS/
Mollusks are divided into three classes: Class Cephaloda (squids), Class Gastropoda (snails), Class Bivalvia (clams and oysters)
Cephalopods have a few orders, one of which is order octopoda ( octopus) and the other is order teuthida ( squids)
the scientific name for the common octopus is octopus vulgaris
the scientific name for the common squid is loligo vulgaris
Which is/are true of the mollusc radula
a toothed structure
is a synapomorphy of Mollusca
is situated in the foregut
present in bivalves
A potential disadvantage of torsion in gastropods:
consumption of feces
more efficient gas exchange
head protection
small body size
Chapter 31 Solutions
INQUIRY INTO LIFE ECOMM
Ch. 31.1 - List the general characteristics of animals.Ch. 31.1 - Prob. 2LOCh. 31.1 - Describe the differences between protostomes and...Ch. 31.1 - Prob. 1CYPCh. 31.1 - List the general characteristics that animals have...Ch. 31.1 - Prob. 3CYPCh. 31.2 - 1. Describe the anatomy and life cycle of sponges...Ch. 31.2 - Prob. 2LOCh. 31.2 - Prob. 3LOCh. 31.2 - Prob. 1QTC
Ch. 31.2 - Prob. 2QTCCh. 31.2 - Describe three main characteristics of sponges.Ch. 31.2 - Prob. 2CYPCh. 31.2 - Prob. 3CYPCh. 31.3 - Prob. 1LOCh. 31.3 - Prob. 2LOCh. 31.3 - Prob. 3LOCh. 31.3 - Prob. 1CYPCh. 31.3 - Prob. 2CYPCh. 31.3 - Prob. 3CYPCh. 31.4 - Identify the characteristic unique to ecdysozoans.Ch. 31.4 - Prob. 2LOCh. 31.4 - Prob. 3LOCh. 31.4 - Prob. 1QTCCh. 31.4 - Prob. 2QTCCh. 31.4 - Prob. 3QTCCh. 31.4 - Prob. 1CYPCh. 31.4 - Prob. 2CYPCh. 31.4 - Prob. 3CYPCh. 31.5 - Prob. 1LOCh. 31.5 -
2. Describe how sea stars move, feed, and...Ch. 31.5 -
1. Explain why echinoderms are more closely...Ch. 31.5 - Prob. 2CYPCh. 31 - Prob. S1.2BYBCh. 31 - Prob. S3.3BYBCh. 31 - Prob. T27.1BYBCh. 31 - Prob. 1ACh. 31 - Prob. 2ACh. 31 - Prob. 3ACh. 31 - Prob. 4ACh. 31 - Prob. 5ACh. 31 - Prob. 6ACh. 31 - Prob. 7ACh. 31 - Prob. 8ACh. 31 - Bivalves, cephalopods, and gastropods are all:...Ch. 31 - Prob. 10ACh. 31 - Prob. 11ACh. 31 - Prob. 12ACh. 31 - Prob. 14ACh. 31 - Prob. 15ACh. 31 - Prob. 16ACh. 31 - Prob. 1TCCh. 31 - Prob. 2TCCh. 31 - Prob. 3TC
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- Serial repetition of the body parts is most specifically referred to as O tacky metamerization O proglottidism tagmatization somaticism tubiculousarrow_forwardMollusca (clams, abalone, nudibranchs, snails, squid, octopi, etc). Unifying features include shell, mantle, radula, foot, visceral mass Which classes show a loss of the shell. How does the shell benefit an organism, how does the loss of the shell benefit other members of this phylum? Distinguish between polyplacophora, bivalva, gastropoda, and chephalopoda We see the first evolution of a true eye here. Who has it? What are chromatophores? How doe members of this group use them? What other unique defense addaptaions do we see in this group? (warning colors, 2 shells, ink)arrow_forwardWhich of the following apply to the spider in the image? echinoderm gastropod book lung trachae chelicera arthropod insect exoskeletonarrow_forward
- What are shared characteristics of all Molluscs? Choose All That Apply visceral mass mantle Omuscular foot exoskeleton a radulaarrow_forwardthis is mytilus edulis. You may have noticed that many mollusks evolved to form a shell although some have a reduced shell or none at all. Which part of their body produces the shell?arrow_forwardWhich of the following classes includes the only type of echinoderm that has a calyx on a stalk? Echinoidea Holothuroidea Ophiuroidea Asteroidea Crinoideaarrow_forward
- Which phylum is characterized by a hard, flexible exoskeleton and multiple life cycles? Echinodermata O Mollusca O Chordata O Arthropodaarrow_forwardFigure 27.6 Which of the following statements is false? Eumetazoans have specialized tissues and parazoans don’t. Lophotrochozoa and Ecdysozoa are both Bilataria. Acoela and Cnidaria both possess radial symmetry. Arthropods are more closely related to nematodes than they are to annelids.arrow_forwardWhich of the following is not a member of the phylum Chordata? a. Cephalochordata b. Echinodermata c. Urochordata d. Vertebrataarrow_forward
- Which phylum includes animals that have a water vascular system? a. Echinodermata b. Hemichordata c. Chordata d. Tetrapoda e. Amniotaarrow_forwardChoose the locomotion mode of each taxonomic group (use once): Echinoidea [ Choose ] [Choose] Cephalopoda jointed legs Polychaetas muscular foot gliding on mucus muscular arms Ophiuroidea stream jet longitudinal muscles only Porifera tube feet Nematoda ciliated larvae, sedentary adult parapodia Arthropoda [Choose] Gastropoda [ Choose]arrow_forwardanimals in which of the following classes possess adductor muscles, labial palps, and use their gills for both respiration and feeding? -Bivalvia -Cephalopoda -Polyplacophora -Anthozoa -Gastropodaarrow_forward
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