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23 Cards in this Set
- Front
- Back
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cell
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The basic unit of structure and function in living things.
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tissue
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A group of similar cells that perform a specific function.
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organ
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A structure that is composed of different kinds of tissue.
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adaptation
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A characteristic that helps an organism survive or reproduce in its environment.
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sexual reproduction
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The process by which a new organism develops from the joining of two sex cells.
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fertilization
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The joining of an egg cell and a sperm cell.
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asexual reproduction
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The process by which a single organism produces a new organism identical to itself.
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phylum
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One of about 35 major groups into which biologists classify members of the animal kingdom.
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vertebrate
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The bones that make up the backbone of an animal.
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bilateral symmetry
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Line symmetry; the quality of being divisible into halves thay are mirror images.
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radial symmetry
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The quality of having many lines of symmetry that all pass throughh a central point.
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larva
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The immature form ofan animal thay looks very different from the adult.
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cnidarian
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An invertebrate animal that uses stinging cells to capture food and defend itself.
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polyp
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A cnidarian body plan characterized by a vase-like shape abd usually adapted for a life attached to underwater surface.
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medusa
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A cnidarian body plan characterized by a bowl shape and adapted for a free-swimming life.
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colony
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A group of many indiviual animals.
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coral reef
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A diverse environment named for the coral animals that make up its stony structure.
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parasite
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An organism that lives inside or on another organism and takes food from the organism in or on the organism it lives on.
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host
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An organism that provides food to a parasite that lives on or inside it.
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free-living organism
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An organism that does not live in or on other organisms.
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scavenger
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A organism that feeds on dead or decaying material.
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anus
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The opening at the end of an organism's digestive system through which waste exits.
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closed circulatory system
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A circulatory system in which blood moves onlywithin a connected network of tubes called blood vessels.
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