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63 Cards in this Set
- Front
- Back
Animals with stinging tentacles are in phylum
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Cnidaria
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Name 3 things found in cnidaria
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corals
jelly fish sea anemones hydras |
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Name the 3 classes in cnidaria
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scyphozoa
anthozoa hydrozoa |
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What are the charac. of cnidarians
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2 cell layers
saclike digestive tract tentacles |
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What kind of symmetry do cnidarians have
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radial
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What kind of nervous system
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simple --no brain--net work of nerve cells and receptor cells make up the nerve net
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What class are jelly fish
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scyphozoa
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What is the medusa (all jelly fish have this)
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umbrella shaped structure w/ tentacles hanging from it
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What does gastrodermis mean
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stomach skin
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What is the mesoglea
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jelly like mass found between epidermis and gastrodermis
(in jellyfish) |
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Are jelly fish considered part of teh palnkton population?
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yes, bec they are floating ...they have limited locomotion
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How do jelly fish move
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use muscles to contract the medusa in a rhythmic fashion..causes them to pulsate in h20
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How do jelly fish breath
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oxygen diffuses directly from the h20 into the animals cells
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What are the tentacles used for?
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defense and food getting
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Stinging cells are called
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cnidoblast
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What is inside each cnidoblast
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nematocyst
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Why are nematocyst discharged
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in response to either a mechanical or chemical stimulus
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What do nematocysts do to prey
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paralyze, can not reuse nematocysts
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How ro jelly fish reproduce
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they have separate sexes, asex and sex pg 175
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fertilized egg is called
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zygote
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organisms in the early stages of developemnt are called
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embryos
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The first embroyic stage occurs when the zygote divides until a solid blass of cells exists called a
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morula
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following rthe morula stage is a hollow ball of cells called a
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blastula
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a ciliated blatula , swimming larva is
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planula
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If a planula attachedes to a hard surface it becomes a
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polyp
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A comb jelly is a ___these are often mistaken for a jelly fish
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Ctenophora
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These have 8 rows of long fused cilia
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Ctenophora--comb jellies
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The most deadly jelly fish
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box jelly--sea wasp pg 177
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The largest of all jelly fish
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lions mane pg 177
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Where are jelly fish found
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every where
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How large is the great barrier reef
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200km long and 80 km wide
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Where is the Grt barrier reef located
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coast of Australia
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What are the 2 types of coral
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hard and soft
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What are the stony (hard )corals made of
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limestone--caco3
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Give 3 examples of hard corals
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brain coral
stag horn coral star coral |
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What are soft corals composed of
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fibrous protein--allows for flexiblity
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Give 3 examples of soft corals
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sea fan
sea whip sea plume |
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What class are corals found in
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Anthozoa--(sea anemones are also found in this class)
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Difference betw/ sea anemones and corals
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corals are colonial
sea anemones live alone or in small groups |
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The basic structure of the coral animal is the
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coral polyp
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What builds reefs
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coral polyps
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When do coral polyps feed
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at night
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The symbiotic algae that lives w/ the coral is
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zooxanthellae
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What does the zooxanthellae do
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photosynthesis(during the day)
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What are zooxanthella
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they are dinoflagellates that are captured by the coral polyp
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What do zooxanthellae have
(like all algae) |
chloroplasts to make sugar
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Why is the coral /zooxanthellae relationship a symbiotic one?
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zoo--benefit by living w/in the coral cell and receiving nutrients
polyps- benefit by recieving oxygen |
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When are reefs formed?
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when coral larvae settle on a substrate in the sand and develope into polyps
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Where do corals get there caco3
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polyp-absorb ca from the c-water
zoox-take up co2produced during polyp respiration |
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The process of reef building is similar to what process in humans
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teeth and bone production
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Where or what is needed for reef production?
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tropical waters
clear water warm water free of sediments |
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At what rate do reefs grow upward
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2.5cm/yr
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What are reefs good for?
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haditats for many other species
protection of coast lines tourism |
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What are some of the ways that reefs are being damaged
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boats and anchors
water polluants severe storms freshwater runoff sediments hi/low water temp |
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What is coral bleaching
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living polyps die off due to either to hi or to low water temps
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What plant like cnidarian is found in class hydrozoa
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hydroids--a colonial animal
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What is a colonial animal
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individual polyps that funciton together as a single organism
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Name the hydroid that is not colonial
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tub-u-lar-ia
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What is the common name for Physalia
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Portuguese man of war
a dangerous hydroid |
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Portuguese man of war is found in class
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hydrozoa
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Name the different functions of the hydroid polyps
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reproduction, keep animal afloat,, defense--sting ,digestion,
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Why is portugese man of war classified with the hydrazoans
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colonial animal made up up of different types of polyps
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Name 2 similarities and 2 differences in corals and sea anemones
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ingestion, digestion, and reproduction are similar
structure and function are similar differences--coral live in large groups as colonial animals attached to one another by a thin membrane that connect the polyps digestion system so there is nutritional sharing |