Sponges
What is the diagnostic cell in sponges?
Choanocyte
What is the diagnostic cell for all cnidarians?
Cnidocyte
What kind of egg is this?
Isolecithal
What ploidy level are the cells in a gastrula?
Diploid
True of False: This sponge has an atrium
False
What kind of digestion do sponges do?
Intracellular Digestion
What does the ectoderm and endoderm become in cnidarians after development?
Epidermis and Gastrodermis
What is Structure A and B?
A:Dorsal Lip
B:Ventral Lip
What structure induces the formation of the neural tube?
Notochord
What lifestyle stage is this animal in? (Double points for exact jellyfish stage)
In polyp stage (Early Strobila/Scyphistoma)
What is the difference between an osculum and an ostium?
Oscula are where water leaves the sponge while ostia are where water enters the sponge.
True or False: A sea pansy will have a medusa stage.
False: No Anthozoan has a motile stage
Label Structures A, B, C and give the developmental process that is occurring.
A and B are the Neural Folds, C is the Neural Groove
This is all occurring during neurulation
What are the two ways to develop a Eucoelom?
Enterocoely and Schizocoely
Name these structures and what they are used for?
Gemmules which are used for asexual reproduction.
What are the three sponge body types from smallest to largest?
Asconoid, Syconoid, Leuconoid
In hydrozoans, what is the shared living tissue (shared gut) called?
Coenosarc
Label all structures and give the animal which this will turn into.
A: Yolk Plug
B: Ectoderm
C: Endoderm
D: Mesoderm
E: Blastocoel
Frog
Why can't a snail have monozygotic twins?
Mollusks are protostome which does spiral cleavage so cells are determinate.
Label structures A, B, and C plus give what type of sponge it is.
A: Spongocoel or Atrium
B: Incurrent Canal
C: Radial Canal
All in a syconoid sponge
What structures/cells will be present within the mesohyl of a sponge.
Porocytes, Spicules, Archeocytes (amoebocytes), and spongin
What kind of coelom formation do all cnidarians do?
Trick Question: They don't have a coelom
Name these structures, what embryonic layer they are from and the primary organizer in this animal.
Somites Made from Mesoderm
Primary Organizer: Henson's Node
Give all the developmental processes and stages for a vertebrate in order.
- Gametes
- Syngamy (Zygote)
- Cleavage (Blastula and Morula)
- Gastrulation (Gastrula)
- Neurulation (Neurula)
- Organogenesis (Pharyngula)
Label A, B and C plus give what C will turn into,
A: Coenosarc
B: Perisarc
C: Budding clone which will developed into a medusa