Studied by 10 peoplewhat is a common name for porifera?
sponges
when did porifera develop?
in the pre-Cambrian age about 660 million years ago
what type of symmetry are sponges categorized as?
asymmetrical(cannot form mirror images when cut)
are porifera segmented?
no
do poriferan have any specialized tissues?
no
do sponges have a coelum?
no
what special structures do porifera have?
collar cells, whip-like flagella, amoebocytes, spicules, Ostia
what are the four classes of Porifera?
calcera, demospongiae, scleropongiae, hexantinellida
how do sponges move?
they don’t unless its in the stages before they attach to the bottom of the ocean
what are the class calcera?
calcareous sponges that have spicules
what are the class demospongiae?
horn sponges(bath sponges)
what are the class scleropongiae?
coralline or tropical reef sponges
what are the class hexactinellida?
glass sponges
what is habitat/ecological niche of sponges?
at the bottom of the ocean being heterotrophs
what is different about sponges compared to other animals?
they evolved separately and have a different common ancestor than any other animal
do sponges have organ systems?
no
how do sponges reproduce?
asexually through budding or fragmentation, and sexually through pushing a sperm/egg cell from the central cavity and into the ocean to find a place to settle and grow
what does sessile mean?
non-moving or unable to move
what are collar cells?
flagellated cells that push water into the sponge’s body cavity and collects nutrients from the water
what are amoebocytes?
cells that digest food and help build the sponges skeleton
what are spicules?
proteins that help support the sponge and aid in reproduction
what are ostium pores?
the pores that allow water to enter the sponge
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