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34 Cards in this Set
- Front
- Back
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What phylum includes "pore-bearers"? |
Porifera |
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Where does water enter and exit a sponge? |
Enters pores and exits osculum |
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What is the layer of cells that covers and protects the sponge? |
Pinnacoderm |
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What is the name of the "wandering" cells that can move around in the middle layer of the sponge? |
Amoebocytes |
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What cells are found on each side of the incurrent pore? |
Porocytes |
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What is another name for a choanocyte? |
Collar cell |
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What is the jelly-like layer between the collar cells and epithelial cells? |
Mesoglea |
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What structures provide support for the sponge? |
Spicules |
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Where is the pinnacoderm in a sponge? |
Outside covering (epidermis) |
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T or F: Sponges are mutlicellular animals |
True |
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T or F: All sponges are aquatic |
True |
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T or F: Sponges are only found in the ocean |
False, some live in freshwater |
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T or F: Some sponges exhibit radial symmetry |
True |
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T or F: Sponges have no organs but true tissues |
False, no tissues or organs...just cells |
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What does sessile mean? |
Stays in one location (stationary) |
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T or F: Sponges are always sessile |
False, larva are cilitated |
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How do sponges reproduce? |
Sexually and asexually |
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What do we call the small growth on sponges that grow into new sponges? |
Buds |
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What do we call the clusters of cells enclosed in a hard outer covering that allows sponges to survive harsh conditions? |
Gemmules |
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T or F: Sponge larva are able to swim |
True |
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What drives water through sponges? |
Collar cells (choanocytes) |
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What are spicules made of in sponges that belong to Class Calcarea? |
Calcium Carbonate |
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T or F: Glass ponges belong to Class Hexactinellida |
True |
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T or F: Bath sponges are composed primarily of spongin |
True |
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T or F: Spicules come in only a few shapes? |
False, many shapes |
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What do we call sponges that produce both eggs and sperm? |
Hermaphrodites |
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T or F: Sponges that reproduce sexually usually self-fertilize |
False, usually don't produce egg and sperm at the same time |
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T or F: Fragmentation is a type of sexual repoduction |
False, asexual |
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What allows collar cells to create a current for feeding? |
Flagella |
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What term describes the way sponges eat? |
Filter feed |
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How does oxygen and waste get exchanged in sponges? |
Diffusion |
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What two traits are used to classify sponges? |
Composition and shape of spicules |
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What is the large opening of a sponge that allows water to exit? |
Osculum |
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What cell type in sponges is responsible for distributing food and oxygen? |
Amoebocytes |
