BIOLOGY 1100
epithelial cells - Answer-only class of cells in sponges; differentiate into other cells specialized for specific functions
collar cells - Answer-specialized cells; form the inner layer of a sponge; line central cavity; trap and digest food particles
spicules - Answer-fibers; ...
BIOLOGY 1100
epithelial cells - Answer-only class of cells in sponges; differentiate into other cells
specialized for specific functions
collar cells - Answer-specialized cells; form the inner layer of a sponge; line central
cavity; trap and digest food particles
spicules - Answer-fibers; make up the skeleton of a sponge
excurrent pore - Answer-single, large pore at the top of a sponge
ameobocytes - Answer-specialized cells; disperse nutrients to and collect waste from
other cells of a sponge
cnidarians - Answer-aquatic invertebrates; exist as polyps at some point in their life
cycles, tentacles with stinging cells
vascuoles - Answer-small fluid-filled cavities within the endoderm; transport nutrients
and oxygen to the cnidarian's cells; removes waste
nematocysts - Answer-hollow, coiled, barbed-tipped protien thread; discharges from
a stinging cell and releases toxin to paralyze a cnidarian's prey
polyp - Answer-sessile stage in the life cycle of a jellyfish
medusa - Answer-free-swimming stage in the life cycle of a jellyfish
2 methods of asexual reproduction by sponges and cnidarians - Answer-budding and
regeneration
Each ___ mollusk, or gastropod, has a large muscular foot below its stomach and
other organs - Answer-stomach
The ___ is a thick layer of epithelial cells covering most of a mollusk's dorsal side
and secretes the building materials for the shell - Answer-mantle
The ___ is the region where the internal organs are located in a gastropod - Answer-
visceral mass
___ clusters called visceral ganglia control the functions of a gastropod's organs -
Answer-nerve
Eyespots are clusters of ___ receptors located either at the base of a snail's
tentacles or on the tips of its eyestalks - Answer-optic
___ are mollusks with 2 hinged shells, including clams, oysters, scallops, mussels,
and shipworms - Answer-bivalves
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