Definitions
this Cnidarian form is attached to the stalk
what is a polyp?
these cells control extension and contraction.
what are muscle cells?
this subclass includes sea anemones and scleractinians.
what is Subclass Hexacorallia.
tend to form ______ of asexual individuals.
hint: aggregation
what is colonies?
cnidarians may harbor photosynthetic symbionts in gastrodermal cells.
true.
the most common function of this cell is defense and prey capture.
what is a nematocyte?
a great capacity to heal and regenerate; more common in polyps.
bonus: list methods.
what is asexual reproduction?
bonus: budding, fission, laceration, fragmentation.
this subclass includes sea fans.
what is subclass Octocorallia?
1) nematocysts: piercing, i.e neurotoxins
2) spirocytes: ensnaring
3) ptychocytes: adhering
Cnidarians are diploblastic.
true.
2 distinct separate sexes
what is gonochoric?
germ cells originate in the gastrodermis; external fertilization; zygote develops into planula larva
what is sexual reproduction?
this Subphylum includes the classes Scyphozoa, Cubozoa, Staurozoa, and Hydrozoa.
Bonus: give examples of each class.
what is Subphylum Medusazoa?
bonus: true jellyfish, box jellyfish, stalked jellies, hydroids/hydrocoral/siphophores.
up to __ % of the host nutrition may be derived from the photosynthetic activity of symbionts?
how much is 90%?
Cnidarians are bilaterally symmetrical around the oral-aboral axis.
False.
They are radially symmetrical.
bell-shaped, generally pelagic Cnidarian form.
what is the medusa?
club shaped structures with statocysts, "eyes", and chemosensory receptors.
what are Ropalia?
this Subphylum consists of class Anthozoa as well as subclasses Hexacorallia and Octocorallia.
what is Subphylum Anthozoa?
1) zooxanthellae
2) zoochlorellae
sea anemones are generally colonial.
False.
They are generally solitary animals.
ciliated grooves in the pharynx
what are siphonglyphs?
name the type of zooid based on the following functions... feeding; defensive; and reproduction.
hint: there are 3.
what are gastrozooids; dactylozooids, and gonozooids?
only polyps; only marine; coelenteron divided by vertical septa into radial compartments; some have a ciliated groove and a pharynx.
what is subphylum Endocnidozoa?
consists of mostly freshwater species; Medusae remain attached to the polyp and can become gonads
what is class Hydrozoa?
false.
they are pre-protostomes, their mouth forms at the site of gastrulation.