7th Chap 2 Mollusk
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| mollusk | An invertebrate with a soft, unsegmented body; most are protected by a hard outer shell.
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| open circulatory system | A circulatory system in which the heart pumps blood into open spaces in the body and blood is not confined to blood vessels.
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| gill | An organ that removes oxygen from water.
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| gastropod | A mollusk with a single shell or no shell.
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| herbivore | An animal that eats only plants.
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| carnivore | An animal that eats only other animals.
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| radula | A flexible ribbon of tiny teeth in mollusks.
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| bivalve | A mollusk that has two shells held together by hinges and strong muscles.
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| omnivore | An animal that eats both plants and animals.
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| cephalopod | An ocean dwelling mollusk whose foot is adapted as tentacles that surround its mouth.
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| Name 5 characteristics of all mollusks. | 1. invertebrate
2. Soft, unsegmented body
3. Often have a outer shell
4. Have a mantle
5. Have a foot
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| What are the three types of mollusks? | 1. Gastropods
2. Bivalves
3. Cephalopods
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| arthropod | An invertebrate that has an external skeleton, a segmented body, and joined appendages.
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| exoskeleton | A waxy, waterproof outer shell or outer skeleton that protects the animal and helps prevent evaporation of water.
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| molting | The process of shedding an outgrown exoskeleton.
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| antenna | An appendage on the head of an animal that contains sense organs.
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| crustacean | An arthropod that has two or three body sections, five or more pairs of legs, and two pairs of antennae.
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| metamorphosis | A process in which an animal's body undergoes dramatic changes in form during its life cycle.
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| arachnid | An arthropod with two body sections, four pairs of legs, and no antenna.
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| abdomen | The hind section of an arthropods body that contains its reproductive organs and part of its digestive tract.
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| What are the four major groups of arthropods? | 1. Arachnids
2. Centipedes/Millipedes
3. Crustaceans
4. Insects
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| What are the 4 main characteristics that all arthropods have? | 1. invertebrates
2. External skeleton
3. Segmented body
4. Jointed appendages
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| insect | An arthropod with three body sections, six legs, one pair of antennae, and usually one or two pairs of wings.
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| thorax | An insect's midsection, to which its wings and legs are attached.
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| complete metamorphosis | A type of metamorphosis characterized by four dramatically different stages.
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| pupa | The third stage of complete metamorphosis, in which an insect changes from a larva to an adult.
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| gradual metamorphosis | A type of metamorphosis in which an egg hatches into a nymph that resembles an adult, and has not distinct larval stage.
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| nymph | A stage of gradual metamorphosis that usually resembles the adult insect.
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