Porifera Flashcards
(27 cards)
How do they get their food?
Choanocytes: filter feeders
What symmetry do they have?
Radial or asymmetrical
List from smallest to biggest: sycon, leucon, ascon
ascon, sycon, leucon
What are the ostia?
Where water enters the sponge
What is the spongocoel?
Cavity in the sponge
What is the osculum? Who has one?
Where water exits, ascon and sycon have them
What are the choanocyte layers like in leucon?
Pockets. In sycon, they are called canals (?)
What is associated with ascon?
Calcarea
What is Calcarea?
Ca2+ spicules, marine, small (asconoid), radia symmetry, vase/tube… Granita, Leucoslenia, Sycon
What is associated with sycon?
Hexatinellida, Calcarea
What is Hecatinellida?
Si2+ spicules with six points, marine, radial (vase), taller than Calcarea… glass sponge
What is associated with Leucon?
All three clases
What is Demospongiae?
Largest, marine or freshwater (only freshwater), spongin forms body (protein skeleton)… Cliona
What is the excurrent canal?
Osculum in leucon
What is mesohyl?
The ‘body’ of the sponge, under the pinacoderm but above the choanoderm
What is gemmule?
Internal bud for asexual reproduction.
What is the structure of choanocytes?
Microvilli collar, flagellum, nucleus
What is a larval sponge
a parenchymula which can disperese
Is preproduction internal or external?
external through buds
Sponges are typically monoecious which means…?
Hermaphrodite
What kinds of asexual preproduction are there?
Budding, fragmentation, gemmules
What is phenotypic plasticity
the ability of individual genotypes to produce different phenotypes when exposed to different environmental conditions (like shape and size)
What are the roles of spongin, spicules, and collagen?
to stiffen the body wall
Is a spongocoel a secondary body cavity?
No
