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What are characteristics all animals share?
1. multicellular 2. eukaryotic - lack cell walls 3. heterotrophic 4. ability to actively move
cells resembling amoebas, that move through body of the sponge; responsible for repair and regeneration; transport food and other materials
skeletal elements that give support to the sponge's body; composed of calcium carbonate, silica, or protein called spongin
simplest form of a sponge; tubular and small; increased growth, sponocoel increases - bigger = not enough collar cells to move sufficient amount of water because no increase in surface area
form of asexual reproduction in which the unequal division of the adult produces two individuals
highest degree of body-wall folding; many chambers lined with collar cells; multiple oscula
how do sponges get nutrients?
filter feeders and suspension feeders; rely on the flow of H2O through choanocyte collar cells
What ecological roles do sponges play?
recycling of Ca; can create toxins to kill corals because of competition for space; produce chemicals that deter grazing; hosts to organisms (mutualism, commensalism)
faster moving = less pressure; allows planes to fly; see diagram in notebook; ergo: sponges usually found in areas of high current because the water is then forced up through the sponge
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