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MOLLUSK VOCAB ONLY
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Ciliated free-swimming larva found in mollusks and some aquatic annelids_______________
Region in a clam that contains the mouth, some sensory structures, and the foot _______________
Flexible, tongue-like strip of tissue covered with tough abrasive teeth used by mollusks (except bivalves) for feeding________________
trochophore
Head-foot
radula
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Region in a clam that contains the
heart, digestive, reproductive, and excretory organs ______________
Mollusk with one or no shell that moves by gliding on a muscular foot including snails, slugs, and nudibranchs _________________
A process occurring during the larval development of gastropods in which the visceral mass twists 180o in relation to the head________________
Visceral mass
gastropod
torsion
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Referring to an organisms that attaches to a surface and does not move_______________
On a clam, the tube through which water enters and leaves the mantle cavity _________________
A mass of nerve cells ________________
sessile
siphon
ganglion
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A organ specialized for the exchange of gases with water _____________
Fan-like structures at the anterior end of a clam that help move food toward the mouth _____________
Pigment cells in the outer mantle layer in cephalopods that can produce sudden color change ________________
gill
palps
chromatophores
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The muscle with which a bivalve
opens and closes its shell __________________
The fluid that is circulated through the body of an animal with an open circulatory system _________________
The epidermal layer of mollusks ________________
Adductor muscle
hemolymph
mantle
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A space between the mantle and the visceral mass in mollusks__________________
The hemolymph-filled space or body cavity of some invertebrates _________________
An aquatic mollusk with a shell divided into 2 halves connected by a hinge like a clam, oyster, or scallop ________________
Mantle cavity
hemocoel
bivalve
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A free swimming, predatory mollusk with a circle of tentacles extending from the head like an octopus, squid, or nautilus __________________
Organism whose embryonic blastopore becomes the mouth _______________
Organism without a backbone ________________
cephalopod
protostome
invertebrate
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Type of development in which offspring hatch as an immature larva and must change into their adult form _____________
Joining of an egg and sperm inside the female’s body _________________
Organism that lives in the ocean (salt water) ________________
indirect
Internal fertilization
marine
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Body cavity with a space surrounded by mesoderm on both sides _____________
Joining of an egg and sperm outside the female’s body _________________
Organism that screens food from water and doesn’t hunt ________________
EucoelomTrue coelom
External fertilization
Filter feeder
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Excretory organ in mollusks _____________
Digestive enzyme that breaks down fats _________________
Describes water dwellers ________________
kidney
bile
aquatic
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Type of development in which offspring start an miniature adults
Space around heart in a clam _________________
Digestive organ that makes digestive enzymes and absorbs nutrients in a clam ________________
direct
Pericardial cavity
Digestive gland