Invertebrates quiz
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| An animal is... | Multicellular
Eukaryotic
Heterotrophic
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| Sponges | No tissues or organs; no symmetry; hollow bag
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| larva | an immature form of an animal that looks very different from the adult
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| Cnidarians | have stinging cells and take food into a central body cavity; hollow, radial symmetry; 2 stage life cycle larvae and medusa or polyp
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| polyp | vase-shaped body plan for a cnidarian fe- jellyfish
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| medusa | bowl-shaped body plan; designed for swimming
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| colony | a group of many individual animals
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| coral reef | built by cnidarians
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| worms | bilateral symmetry, no legs, flatworms, round worms, segmented worms
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| parasite | an organism that lives inside or on another organism
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| host | the organism in or on which it lives
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| free-living organism | an organism that doesn't live in or on other organisms
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| scavengers | animals that feed on dead or decaying material
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| anus | where wastes exists; at the far end of the tube
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| closed circulatory system | what segmented worms have; blood moves only within a connected network of tubes called blood vessels
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| mollusks | soft, unsegmented bodies that are often protected by a hard outer shell; gills, mantle, foot, often radula, bilateral. symmetry, gastropods, bivalves, cephalopods
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| open circulatory system | the blood is not always inside blood vessels
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| gills | organs that remove oxygen from the water.
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| gastropods | largest group of mollusks. They include snails and slugs. have a single external shell or no shell at all
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| herbivores | animals that eat only plants
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| carnivores | animals that eat only other animals
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| radula | flexible ribbon of tiny teeth, to obtain food; organ
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| bivalves | mollusks that have two shells held together by hinges ang strong muscles. Includes oysters, clams, scallops and mussels
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| omnivores | animals that eat plants and animals
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| cephalopods | an ocean dwelling mollusk whose foot is adapted to form tentacles around its mouth. Only mollusks with a closed circulatory system fe octopus, squid
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| arthropods | divided into 4 major groups; crustaceans, arachnids, centipedes and millipedes, and insects. Invertebrates that have an external skeleton, a segmented body, and jointed attachments called appendages
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| exoskeleton | a waxy water-proof covering. Protects the animal and helps prevent evaporation of water
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| molting | shedding an outgrown exoskeleton
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| antenna | an appendage attached to the head that contains sense organs
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| crustaceans | an arthropod that has 2-3 body sections, 5 or more pairs of legs, and 2 pairs of antennae like shrimp lobster or crabs
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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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| arachnids | arthropods with 2 body sections- cephalothorax and abdomen, four pairs of legs, and no antennae fe spiders-predators, ticks-parasites, mites-parasites, scorpions-predators
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| abdomen | the hind section. Contains the reproductive organs and part of the digestive system.
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| insects | arthropods with 3 body sections, 6 legs, 1 pair antennae, and usually 1-2 pairs wings like beesflies and moths. head: senses, compound eyes, antennae, many mouth part adaptations thorax: legs and wings attached, 3 pair legs
abdomen:many internal organs
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| thorax | midsection, the section to which wings and legs are attached
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| complete metamorphosis | 4 diff. stages; egg, larva, pupa, and adult
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| pupa | stage after larvae when insect is enclosed in a protective covering
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| gradual metamorphosis | an egg hatches into a nymph that resembles an adult and which has no distinct larval stage stages are less distinct
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| bilateral symmetry | one line fe fish
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| radial symmetry | many lines fe seastar
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| centipedes | 1 pair of legs for each bodysegment
carnivorous
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| millipedes | 2 pairs of legs for each body segment
herbivores
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| echinoderms | endoskeleton, radial symmetry, bumpy or spiky surface, water vascular system that helps with transport of materials and with movement, tube feet. live in saltwater
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| nymph | a stage of gradual metamorphosis that usually resembles the adult insect
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| endoskeleton | an internal skeleton
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| water vascular system | the internal system of fluid filled tubes in echinoderms
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| tube feet | extensions of an echinoderms water vascular system that stick out from the body and function in movement and obtaining food
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Created by:
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