Cnidaria Flashcards
1
Q
habitat
A
aquatic, most salt water some fresh water
2
Q
gastroderm
A
contain nutritive/muscle cell and nerve cell
3
Q
epiderm
A
contain epithelial muscle cells and nerve cells
4
Q
digestion
A
incomplete digestive tract; contain one opening
5
Q
polyp
A
asexual and sedentary
6
Q
medusa
A
sexual and planktonic(jellyfish)
7
Q
dimorphic
A
two different body plans
8
Q
Cnidrocyte
A
cell that contain cnidocil (trigger hair) and operculum. It releases osmotic barrier, water rushes in, and the thing pops out. It penetrates whatever it touches,
9
Q
C. Hydrozoa
A
4k species, morphs are equal,solitary or colonial, only class found in fresh water
10
Q
C. Syphozoa
A
jellyfish about 200 species
- polyp phase very short about a month, medusa phase longer
- eat plankton small fish
- eaten by sea turtles
11
Q
C. Cubizoa
A
- 10 species,medusa dominant phase
- medusa is a cube shape
- ex. seawasp cnidocyte can penetrate skin and be lethal
12
Q
C. Anthozoa
A
Coral, anemones, sea pens, sea fan, contain around 6000 species, contain polyp only
oReef building corals
