zoo boo 1
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| Cnidaria Have _____ symmetry, _________, Have a ___________ digestive system, ______ cells but no ______, and _______ | Radial, diploblastic, incomplete, nerve, brain, muscle
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| Cnidarians nerve cells are _______ or ________ synapses | non polar or bidirectional
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| Have both ________ and ________ digestion | intracellular and extracellular
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| Loss of medusa stage in some groups. _______ stage releases egg or sperm and _____ settles to form a new _______ stage | hydroid, planula, hydroid
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| Large complex hydroid | Sea anemones
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| Freshwater hydroid | Hydra
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| a small colonial polyp that exhibits polymorphism | Obelia
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| Part of a cnidarian that uses tentacles for prey | Gastrozooids
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| life cycle of cnidarians | medusa from the polyp of the cnidarian bud off and produce eggs or sperm to create a fertilized egg, then a zygote, then a planula, and divides into the polyp body and form multiple polyps (obelia) by asexual reproduction, that can repeat the cycle.
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| Physalia - Portuguese man-o-war | a pelagic (floating) colonial hydroid, not a medusa.
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| _________ reproduction plays an important role in a cnidarians life | asexual
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| The skeleton of a cnidarian is_______ and 3 things about it | Coral: Colonial cnidarians, Interconnected gastrovascular cavity, Produce a supporting skeleton.
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| sea fans and sea whips. Polyps connected by tubula gastrovascular cavities, 8 branched tentacles. Polyps can withdraw into a fleshy tissue, internal flexible protein skeletal rod. | Soft Corals
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| Polyps connected by sheet like gastrovascular cavities, many unbranched tentacles, external skeleton of calcium carbonate. | Hard Coral
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| Coral reef's have a symbiotic relationship with ________ _________ _______ | Single Cellular Algae
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| Biotic Benefits for algae in coral reefs | Nutrients and protection
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| Biotic Benefits for coral having algae | added food and oxygen, increased rate of limestone deposition due to less acidity in coral tissue.Coral tissue produces Carbonic acid from CO2 and the algae uses CO@ as a source for photosynthesis and removes this lowering the acidity of coral's tissue.
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| Abiotic factors: necessary for algal growth | 20 C or warmer. 30 N and S of the equator.
Light: depths of 60m or less. shallow waters off continents and near volcanoes.
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| project seaward directly from the shore of an island or continent. | Fringing reef
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| separated a greater from the shore by a lagoon | Barrier reef
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| A roughly circular ring of islands formed of coral rock deposited around an extinct, sunken volcano and separated lagoon | atoll
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| region where sediments, reduced wave action, warmer temperatures, and lower oxygen levels interfere with coral growth. | lagoon
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| Conditions that threaten coral | sediments, pollutants,
temperatures
that
are
too
warm:
cause
corals
to
expel
their
symbiotic
algae,
a
phenomenon
called
“coral
bleaching”.
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Created by:
wil96