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Courtney Hall chapter 14
coral reefs
23
Science
12th Grade
04/16/2012

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Term
cnidarians
Definition
animals in the phylum cnidaria; they have radial symmetry, tissue-level organization; and tentacles with nematocysts, specialized stinging structures
Term
polyps
Definition
the sessile, sac-like stage, with the mouth and tentacles on top
Term
medusa
Definition
the swimming, bell-like stage, with the mouth and tentacles underneath
Term
plankton
Definition
primary producers and consumers that drift with the currents
Term
zooxanthellae
Definition
dinoflagellates that live within animal tissues
Term
symbiosis
Definition
the iving together in close association of two different species, often divided into patasitism, where one species benefits at the expense of the other; commensalism, where one species benefits without affecting the other; and mutualism, where both species benefit
Term
photosynthesis
Definition
CO2+H20+sun energy --> organic matter+02
Term
detritus
Definition
particles of dead organix matter
Term
coralline algae
Definition
red algae that deposit calcium carbonate in their tissues
Term
bryozoans
Definition
small, colonial, encrusting andimals that make delicate, often lacelike, skeletons
Term
formaniferans
Definition
protozoans, often microscopic, with a calcium carbonate shell
Term
aristotle's lantern
Definition
a complicated set of calcium teeth and associated muscles that is found in sea urchins
Term
the trade winds
Definition
the steadiest winds on earth, blow from latitudes of about 30 degrees toward the equator
Term
subsidence
Definition
the slow sinking into the mantle of a part of the earth's crust that contains a landmass
Term
primary production
Definition
the conversion of carbon from an inorganic form, carbon dioxide, into organic matter by autotrophs, that is, the production of food
Term
nitrogen fixation
Definition
the conversion of nitrogen gas into nitrogen compounds that can be used by primary prducers as nutrients
Term
competative exclusion
Definition
the elimination of one species by another as a result of competition
Term
ecological niche
Definition
the combination of what a species eat, where it lives, hot it behaves, and all the other aspects of its lifestyle
Term
tube feet
Definition
water-filled tubes possessed only by echinoderms, many of which end in a sucker and can be extended and contracted to grip things and to move around
Term
chitons
Definition
molluscs whose shells consist of eight overlapping plates on their upper, or dorsal, surface
Term
chitons
Definition
molluscs whose shells consist of eight overlapping plates on their upper, or dorsal, surface
Term
faculative symbiont
Definition
a symbiont that is not completely dependent on its paerner and can live outsife the symbiosis
Term
obligate symbiont
Definition
one that depends on its partner and does not occur outisde the symbiosis
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