Phyla
Basal group
What is Ctenophora (or Porifera)
large opening through which water leaves
What is the osculum?
usually contain barbs at the base of a long coiled thread
What are nematocysts?
Gonads are derived from epidermal tissue
What is Hydrozoa?
Master control gene
What is the Hox gene?
Comb jellies
What is Ctenophora
Monoecious
What is hermaphroditic?
Mouth and tentacles hanging down from an umbrella-shaped bell
What is medusa
Portuguese Man O’ War are in this class
What is Hydrozoa?
inner layer (from endoderm)
What is gastrodermis?
Snare victims with colloblasts
Ctenophora
Defining cell type
What is a choanocyte
Sensitive to tactile stimulation
What is cnidocil?
Most venomous of all the cnidarians
What is Cubozoan
Stinging cells
What are Cnidocytes?
Only phylum that lacks true tissues
Porifera
Internal buds that remain dormant until more favorable conditions arise
What is gemmule?
forms that are sessile as adults
What are polyps?
Flower animals
What is Anthozoa?
Only endoderm and ectoderm
What is diploblast
Hydrozoans; Scyphozoans; Anthozoans
Cnidaria
central cavity within the body
What is spongocoel
Blastula that became ciliated and bilaterally symmetrical
What is planula larva?
Includes all (and only) of the 200 known marine jellies
Scyphozoa
Muscular pads at the corners of the square bell canopy
What are pedalia?