Sponges Phylum Porifera: Question Preview (ID: 16367)


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Sponge skeletons made of calcium carbonate or silica are called
a) spongin b) tests c) spicules d) valves
Because sponges stay in one place all there lives and feed off of food particles in the water they are called
a) mobile filter feeders b) sessile autotrophs c) mobile autotrophs d) sessile filter feeders
What is the function of epidermal cells?
a) pass nutrients to other cells b) create water currents that pass through the sponge c) protection d) reproduction
What is the function of amoebocytes?
a) pass nutrients to other cells b) create water currents that pass through the sponge c) protection d) reproduction
How do collar cells create water currents?
a) beating of their flagella b) by contraction and relaxation of the cells c) by swimming freely in circles in the central cavity d) by causing a vortex for the water to flow through
What is the function of collar cells?
a) pass nutrients to other cells b) create water currents that pass through the sponge c) protection d) reproduction
Which one of the following cell types is not found in sponges?
a) collar cells (choanocytes) b) amoebocytes c) neurons d) epidermal cells
What level of organization of tissues do sponges have?
a) cellular b) tissue c) organ d) organ-system
Sponge skeletons made of collagenous fibers are called
a) spongin b) tests c) spicules d) valves
Asexual reproduction in sponges occurs by
a) a. fragmentation b) b. budding c) c. a and b are correct d) d. none are correct
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