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63 Cards in this Set

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