Cnidaria is a phylum containing over 10,000 species of animals found
exclusively in aquatic ... Some, however, omit either the polyp or the medusa
stage. .... the polyp and medusa forms, or of zooid...
polyp and medusa names for the two body forms, one nonmotile and one
typically ... In such organisms the polyp, by budding, gives rise to medusae,
which either ... the polyp exists, as in the hydra and the sea anemone, the
organism has the ...
4)Two different forms exist, medusa and polyp 5)Reproduction ... The Cnidocyst
has either a modified flagellum called a Cnidocil, or a cone as a sensory trigger.
In the Medusoid form, the organism is essentially upside-down, with the mouth
and ... They live either as solitary polyps, such as sea anemones, or in colonies of
polyps, ... Most hydroids alternate between a polyp and a medusa stage,
although not all ... They exist only in the polyp stage and obtain their food by filter
Dec 11, 2015 ... Both polyp and medusa forms consist of a digestive sac, the ... Medusae are
usually free-swimming and either propel themselves using ... A hydrostatic
skeleton is maintained by the internal pressure of fluids within the organism. ...
Most anthozoan species exist exclusively in the polyp form and do not ...
The main characteristic that separates invertebrates from other organisms is the
... Cnidarians exhibit two basic body forms called polyp and medusa. ... Habitat -
They may be aquatic either marine or fresh water; or terrestrial; free-living and ...
You will identify and compare and contrast the ... Filter feeding is a method in
which an organism feeds by filtering small ..... Polyp form has a tube-shaped
body with a mouth surrounded by tentacles. .... either the polyp or medusa stage.
Nov 28, 2012 ... The "immortal jellyfish" can transform itself back into a polyp and begin life anew.
... depending on their stage in the life cycle, resemble either a jellyfish or a soft
coral. ... Among the hundreds of organisms he collected was a tiny, relatively .... A
Turritopsis medusa, however, sinks to the bottom of th...
Many members of the phylum exist only in one form or the other. ... Compare this
organism with that that of Metridium, a marine polyp known as a sea anemone (
Perry & Morton, Fig. 90c) ... Can you identify the gastrodermis and epidermis? ...
A container of small organisms (either the multicellular arthropod Daphnia or the
In anthozoans, the polyp is the gamete-producing form and the cycle is embryo>
larva>polyp. .... The outer tissue layer of a cnidarian polyp, larva or medusa. ... A
germ layer in animal embryos that can give rise to either endoderm or mesoderm.
.... cell type diversity exists in cnidarians than is indicated by morphology alone.