Quiz 2 Cnidaria/Ctenophores Flashcards
Define dimorphic
two body forms
Which animal group is dimorphic
cnidarians
Two body types of cnidarians
medusa and polyp
What is planktonic
in the water column with movement subject to ocean currents
what is pelagic
living in the open ocean
what are the specialized cells on cnidarians
cnidocytes
What do cnidocytes contain
nematocysts
examples of class Hydrozoa
Hydra, Obelia, Man of War, Fire Corals, and “Friends”
dominant form in hydrozoa
polyp
what hydrozoan has two polyp types
obelia
Obelia feeding function polyp
gatrozooids/hydranths
Obelia asexual reproduction polyp
gonozooids/gonangium/a
What symmetry do cnidarians have
radial symmetry
Classes of cnidarians
hydrozoans, scyphozoans, anthozoans
dominant form in scyphozoans
medusa
Amount of mesoglea in hydrozoans
little
amount of mesoglea in scyphozoans
a lot
life cycle of scyphozoans
planula larva, scyphistoma, strobila, ephyra
In aurelia, what do marginal tentacles do?
sensory information and defense and locomotion
In aurelia, what do oral arms do
defense and prey capture
In aurelia, what do gonads do
organs for sexual reproduction
In aurelia, what is gastric pouch for
one of four divisions of the GVC for digestion of food
In aurelia, what does the rhopalium do
sensory organ, little divots in the side of the jelly
In aurelia, what does the gastric canal do
extension of gastric pushes that distribute nutrients to outer rim of jellyfish
