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biology final

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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Question
Answer
natural selection   process by which individuals that are better suited to their enviornment survive and reproduce most successfully  
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artificial selection   selection by humans for breeding useful traits from the natural variation among different organisms  
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survival of the fittest   process by which individuals that are better suited to their enviornment survive and reproduce most successfully  
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fitness   ability of an organism to survive and reproduce in its enviornment  
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gene pool   combined genetic information of all the members of a particular population  
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adaptions   inherited characteristic that increases an organisms chance of survival  
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reproductive isolation   seperation of species or populations so that they cannot interbreed and produce fertile offspring  
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geographic isolation   two populations are separated physicall by geographic barriers such as rivers, mountains, or stretches of water  
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evolution   change in an organism over time  
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mutation   change in a dna sequence that affects genetic info  
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coevolution   process by which two species evolve in response to changes in each other  
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virus   particle made up of nucleic acid, protein, and in some cases lipids that can replicate only by infecting living cells  
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bacteria   domain of unicellular prokaryotes that have cell walls containing peptidoglycans  
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pathogens   disease-causing agent  
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lytic virus   process in which a virus enters a cell, makes a copy of itself and causes the cell to burst  
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lysogenic virus   process by which a virus embeds its dna into the dna of the host cell and its replicated along with the host cells dna  
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decomposer   organism that breaks down and obtains energy from dead organic matter  
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hyphae   tiny filament that makes up a multicellular fungus or water mold  
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rhizoid   a rootlike hypha that penetrates the surface of an object, in mosses along the cell that anchors the moss to the ground and absorbs water and minerals from surrounding soil  
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mycelium   many hyphae tangled together into a thick mass comprises bodies of multicellular fungi  
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antibiotic   compound that blocks the growth and reproduction of bacteria  
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prokaryote   a single celled organism lacking a nucleus  
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eukaryotes   orgnism whose cells contain nuclei  
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multicellular   more than one cell  
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unicellular   one cell  
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angiosperms   flowering plants; bears its seeds within a layer of tissue that protects the seed  
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gymnosperms   seed plant that bears its seeds directly on the surface of cones  
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cones   cone in gymnosperms that produces male gametophytes in the form of pollen grains  
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seeds   embryo of a living plant that is encased in a protective covering and surrounded by a food supply  
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pollen   male gametophyte in seed plants  
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plant ovary   a flower structure that contains one or more ovules from which female gametophtes are produced  
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dicot   angiosperm whose seeds have two cotyledons  
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monocot   angiosperm whose seeds have one cotyledon  
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xylem   vascular tissue that carries water upward from the roots to every part of a plant  
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phloem   vascular tissue responsible for the transport of nutrients and the carbohdrates produced by photosynthesis  
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taproot   primary foot found in some plants that grows longer and thicker than other roots  
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fibrous root   part of a root system in which roots branch to such an extent that no single rootgrows larger than the rest  
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diffusion   molecules tend to move to an area where they are more concentrated to an area where they are less concentrated  
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transpiration   loss of water from a plant through its leaves  
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capillary action   tendency of water to rise in a thin tube  
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tree rings   tells tree age  
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guard cell   controls the opening and closing of stomata by responding to water pressure  
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stoma   opening in the underside of a leaf that allows carbon dioxide and oxygen to diffuse into and out of the leaf  
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bilateral symmetry   body plan in which only a single imaginary line can divide the body into two equal halves  
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radial symmetry   body plan in which body parts repeat around the center of the body  
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asymmetry   lack of balance or symmetry  
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nerve net   loosely organized network of nerve cells that together allow cnidarians to detect stimuli  
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nematocysts   the stinging structure within each cnidocyte of a cnidarian, used to poison or kill prey  
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polyp   usually sessile stage of the life cycle of a cnidarian that has a cylindrical body with arm like tenticles  
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medusa   motile stage of the life cycle of a cnidarian that has a bell shaped body  
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ganglia   group of nerve cells  
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eye spot   group of cells that can detect changes in the amount of light in the enviornment  
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segmentation   dividing into segments  
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setae   bristle attached to the segments of many annelids  
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coelom   fluid filled body cavity lined with mesoderm  
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mantle   thin layer of tissue that covers most of a mollusks body  
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visceral mass   area beneath the mantle of a mollusk that contains the internal organs  
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foot   muscular part of a mollusk  
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exoskeleton   tough external covering that protects and supports the body of man invertebrates  
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molting   process in which an arthropod sheds its exoskeleton and manufactures a larger one to take its place  
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book lungs   organ tat has layers of respirator tissue stacked like the pages of a book  
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endoskeleton   structural support located inside the body of an animal  
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closed circulatory system   system in which blood is contained within a network of blood vessels  
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open circulatory system   system in which blood is not always contained within a network of blood vessels  
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vertebrate   animal that has a vertebral column or backbone  
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invertebrates   animal that does not have a backbone or vertebral column  
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lungs   spongy saclike respiratory organs occupying the chest cavity together with the heart to remove carbon dioxide from blood adn replaces it with oxygen  
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swim bladder   internal gas-filled organ in many bony fishes that adjusts their buoyancy  
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gills   filamentous organ in aquatic animals specialized for the exchange of gases with water  
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exothermic   releasing heat  
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air sacs   allows for the one way flow of air through the respiratory system of birds  
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endothermic   animal that generates its own body heat and controls its body temperature from within  
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monotreme   egg laying mammal  
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placental   membranous vascular organ that develops in female mammals, lining the uterine wall and partially enveloping fetus attached by umbillical cord  
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marsupial   mammal which bears live young that complete their development in an external pouch  
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ossification   process of bone formation during which cartilage is replaced by bone  
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ligament   strip of tough connective tissue that holds bones together at a joint  
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tendon   tough connective tissue thats joins skeletal muscles to bones  
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lymphatic system   interconnected system of spaces and vessels between body and tissue and organs by which lymph circulates throughout the body  
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blood pressure   pressure exerted by blood against walls of the blood vessels especially the arteries  
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