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ADVBIO - Chapter 34 Quiz
Terms in this set (40)
The presence of a lophophore in a newly discovered species would suggest that the species _____.
is a suspension feeder
Which one of the following is a lophotrochozoan?
Nematodes and arthropods both _____.
grow by shedding their exoskeleton
You find what you believe is a new species of animal. Which of the following characteristics would enable you to argue that it is more closely related to a flatworm than it is to a roundworm?
It has no coelom.
A(n) _____ has a crown of ciliated tentacles that function in feeding.
Which one of these mollusk groups can be classified as suspension feeders?
Which mollusk group can be described as having several calcium carbonate plates along their dorsal side?
What would be the best anatomical feature to look for to distinguish a gastropod from a chiton?
number of shell plates
What is the only group of Mollusca that does NOT have a radula?
In your laboratory, you examine a vial of freshwater from a local pond. You notice several unfamiliar small (less than one millimeter in length) animals and decide to study them. You observe that the animals have a coelom, eat microscopic food particles, reproduce by parthenogenesis, and have offspring that do not undergo any larval stages. What else would you expect to observe about this organism?
You find a wormlike animal while scuba diving and want to determine whether it is a nudibranch, a polychaete, or a flatworm. Finding which of the following traits would best help you classify the mystery animal?
bristle-like structures on tiny appendages
Which of the following organisms would you expect to have the largest surface-area-to-volume ratio? Assume that all of the following are the same total length.
A cephalopod's tentacles are modified from its _____.
If a lung were to be found in a mollusc, where would it be located?
Which mollusc clade includes members that undergo embryonic torsion?
A terrestrial mollusc without a shell belongs to which clade?
The antennae of insects have a function most similar to that of _____.
A land snail, a clam, and an octopus all have _____.
In adult arthropods, the hemocoel _____.
acts as a hydrostatic skeleton for mobility
Which adaptation is unique to insects among all protostomes?
the ability to move by flying
You find a multi-legged animal in your garden and want to determine if it is a centipede or a millipede. You take the animal to a university where a myriapodologist quickly tells you that you have found a centipede. Which of the following may have allowed her to make this distinction?
Whiteflies are common pest insects found on cotton, tomato, poinsettia, and many other plants. Nymphs are translucent and mostly sessile, feeding on their host plants' phloem (sap) from the undersides of leaves. They undergo incomplete metamorphosis into winged adults. Because whitefly nymphs cannot escape predation by moving, you hypothesize that their translucent bodies make them hard to spot by predators. How could you directly test this hypothesis?
Compare rates of predation on whitefly nymphs coated with a nontoxic dye vs. undyed whitefly nymphs.
All arthropods _____.
2, 3, 4, 5
What would be the most direct effect of removing or damaging an insect's antennae? The insect would have trouble _____.
On which body segment are arthropod wings attached?
Which of the following are characteristics of arthropods?
1, 2, and 4
Among the invertebrate phyla, phylum Arthropoda is unique in possessing members that have _____.
A shared derived characteristic for members of the arthropod subgroup that includes spiders would be the presence of _____.
You find a small animal with eight legs crawling up your bedroom wall. Closer examination will probably reveal that this animal also has _____.
simple, but not compound, eyes
A terrestrial animal species is discovered with the following larval characteristics: exoskeleton, system of tubes for gas exchange, and modified segmentation. A knowledgeable zoologist should predict that the adults of this species would also feature _____.
an open circulatory system
The possession of two pairs of antennae is a characteristic of _____.
In a tide pool, a student encounters an organism with a hard outer covering that contains much calcium carbonate, an open circulatory system, and gills. The organism could potentially be a crab, a shrimp, a barnacle, or a bivalve. The presence of which of the following structures would allow for the most certain identification of the organism?
When considering the wormlike phyla within the protostomes, which feature is most useful in distinguishing groups?
feeding structures or mouthparts
The heartworms that can accumulate within the hearts of dogs and other mammals have a pseudocoelom, an alimentary canal, and an outer covering that is occasionally shed. To which phylum does the heartworm belong?
A student observes a wormlike organism crawling about on dead organic matter. Later, the organism sheds its outer covering. One possibility is that the organism is a larval insect (like a maggot). However, it might be a member of the phylum ________, and one way to distinguish between the two possibilities is by looking for the presence or absence of ________.
Nematoda; a circulatory system
Nematode worms and annelid worms share which of the following features?
a digestive tract with two openings (a mouth and an anus)
Upon close inspection of movement in annelids and nematodes, you would notice an obvious difference. Nematodes tend to wriggle back and forth, while annelids tend to contract along their length as their girth swells and then thin out as they stretch. What anatomical feature explains this type of movement?
The nematodes lack circular muscle fibers.
The body cavity type for arthropods and mollusk can best be described as _____.
a reduced coelom
Arthropod exoskeletons and mollusk shells both _____.
help retain moisture in terrestrial habitats
Among protostomes, which morphological trait has shown the most variation?
type of body cavity (coelom vs. pseudocoelom vs. no coelom)
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