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Stack #1845600

adaptation A behavior or physical characteristic that allows an organism to survive or reproduce in its environment.
fertilization The joining of an egg and sperm.
vertebrate Animal with a backbone.
invertebrate Animal without a backbone.
bilateral symmetry Body plan with two halves that are mirror images.
radial symmetry The quality of having many lines of symmetry that all pass through a central point.
larva The immature form of an animal that looks very different from the adult.
cnidarian An invertebrate animal that uses stinging cells to capture food and defend itself.
polyp The cnidarian body plan is characterized by a vase like shape and that usually adapted for a life attached to an underwater surface.
medusa The cnidarian body plan having a bowl shape and adapted for a free-swimming life.
parasite The organism that benefits by living on or in a host in a parasitism interaction.
host The organism that a parasite or virus lives in or on.
scavenger A carnivore that feeds on the bodies of dead organisms.
closed circulatory system A circulatory system in which blood moves only within a connected network of tubes called blood vessels.
mollusk An invertebrate with a soft, unsegmented body; most are protected by a hard outer shell.
open circulatory system Circulatory system in which the heart pumps blood into open spaces in the body, and blood is not confined to blood vessels.
gill An organ that removes oxygen from water.
gastropod A mollusk with a single shell or no shell.
cephalopod A ocean-dwelling mollusk whose foot is adapted as tentacles that surrounds its mouth.
bivalve A mollusk that has two shells held together by hinges and strong muscles.
herbivore A consumer that only eats plants.
carnivore A consumer that only eats meat.
omnivore A consumer that eats meat and plants.
radula Flexible ribbon of tiny teeth in mollusks.
Arthropod An invertebrate that has an external skeleton a segmented body and joined appendages.
exoseleton A waxy waterproof outer shell or outer skeleton that protects the animal and helps prevent evaporation of water.
molting The process of shedding an outgrown exoskeleton.
crustacean An arthropod that has two or three body sections, five or more pairs of legs, and two pairs of antennae.
complete metamorphosis A type of metamorphosis characterized by four dramatically different stages.
gradual metamorphosis A type of metamorphosis in which an egg hatches into a nymph that resembles an adult.
arachnid An arthropod with two body sections, for pairs of legs, and no antenne.
insect An arthropod with three body sections, six legs, one pair of antennae, and usually one or two pairs of wings.
thorax An arthropods midsection, which its wings and legs are attached.
pupa The third stage of the complete metamorphosis, in which the insect changes from a larva to an adult.
nymph A stage of gradual metamorphosis that usually resembles the adult insect.
echinoderm A radially symmetrical invertebrate that lives on the ocean floor and has an internal skeleton and a water vascular system.
endoskeleton A system of fluid filled tubes in an echinoderms body.
water vascular system An internal skeleton on an insect.
Created by: barreironataly