Inverts Midterm
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30 questions
| 🇬🇧 | 🇬🇧 |
| 3 classes of porifera? | 1. calcarea (CaCO3 spicules) 2. hexactinellida (siliceous spicules - glass sponges) - think haxa=6 -> 6 sides crystalline structure 3. demospongiae (have siliceous spicules and/or extensive spongin structure) - think demo=people -> sponges people use at home |
| 3 classes of porifera? | 1. calcarea (CaCO3 spicules) 2. hexactinellida (siliceous spicules - glass sponges) - think haxa=6 -> 6 sides crystalline structure 3. demospongiae (have siliceous spicules and/or extensive spongin structure) - think demo=people -> sponges people use at home |
| 3 classes of porifera? | 1. calcarea (CaCO3 spicules) 2. hexactinellida (siliceous spicules - glass sponges) - think haxa=6 -> 6 sides crystalline structure 3. demospongiae (have siliceous spicules and/or extensive spongin structure) - think demo=people -> sponges people use at home |
| 3 classes of porifera? | 1. calcarea (CaCO3 spicules) 2. hexactinellida (siliceous spicules - glass sponges) - think haxa=6 -> 6 sides crystalline structure 3. demospongiae (have siliceous spicules and/or extensive spongin structure) - think demo=people -> sponges people use at home |
| 3 classes of porifera? | 1. calcarea (CaCO3 spicules) 2. hexactinellida (siliceous spicules - glass sponges) - think haxa=6 -> 6 sides crystalline structure 3. demospongiae (have siliceous spicules and/or extensive spongin structure) - think demo=people -> sponges people use at home |
| 3 classes of porifera? | 1. calcarea (CaCO3 spicules) 2. hexactinellida (siliceous spicules - glass sponges) - think haxa=6 -> 6 sides crystalline structure 3. demospongiae (have siliceous spicules and/or extensive spongin structure) - think demo=people -> sponges people use at home |
| 3 classes of porifera? | 1. calcarea (CaCO3 spicules) 2. hexactinellida (siliceous spicules - glass sponges) - think haxa=6 -> 6 sides crystalline structure 3. demospongiae (have siliceous spicules and/or extensive spongin structure) - think demo=people -> sponges people use at home |
| 3 classes of porifera? | 1. calcarea (CaCO3 spicules) 2. hexactinellida (siliceous spicules - glass sponges) - think haxa=6 -> 6 sides crystalline structure 3. demospongiae (have siliceous spicules and/or extensive spongin structure) - think demo=people -> sponges people use at home |
| 3 classes of porifera? | 1. calcarea (CaCO3 spicules) 2. hexactinellida (siliceous spicules - glass sponges) - think haxa=6 -> 6 sides crystalline structure 3. demospongiae (have siliceous spicules and/or extensive spongin structure) - think demo=people -> sponges people use at home |
| Describe Choanoflagellates body form (3 features) | Collar, flagellum, barrel shaped body |
| Choanoflagellate reproduction is | Both asexual and sexual |
| Choanoflagellates are (2 things) eukaryotes | Choanoflagellates are free-living unicellular colonial flagellate eukaryotes |
| What is this? | Colony of choanoflagellates |
| Porifera are ___ as adults but ___ as juveniles | Sessile, larval |
| How does proifera feed? | Mostly through hydraulic suspension feeding (can capture up to 90% of bacteria), some symbiotic, some carnivorous (zooplankton) |
| What are choanocytes/collar cells? | Small pores of specialized feeding cells which pump water into sponge |
| Does porifera have a specialized gut? | NO - have an interconnected system of water canals |
| Does porifera have connective tissue? | YES - have a collagen like substance |
| Does porifera have epithelial tissue? | NO - has protoepithelia (located on outer surface but has no true epithelial tissue bc it has holes) |
| What is the reproductive mode of porifera? | Most sexual hermaphrodites that use broadcast spawning but some can reproduce asexually |
| 3 features of choanocytes? | Flagellum, collar, cell body |
| 3 purposes of choanocytes | 1. Create water current through sponge • bring in food • bring in oxygen • expel waste products (CO2, NH3) • disperse gametes 2. Food capture (and phagocytosis) •food brought to mesohle 3. Sperm capture: within a sponge sperm packets are endocytosed, and sperm is endocytosed (released) to the mesohyle (the gelatinous matrix within a sponge) where fertilization takes place can differentiate btwn food & sperm when both brought to mesohyle |
| What are the 4 main sponge cell types and structures? | 1. porocyte 2. archaeocyte 3. pinacocyte 4. spicules |
| What is the function of a porocyte? what group does it belong to? | Porifera - form pores through the outer wall |
| What is the function of a archaeocyte? what group does it belong to? | Porifera - totipotent cells that can change into all of the other types of sponge cells, with a large nucleus and undifferentiated shape also do: 1. Food digestion (after lysis) 2. Storage of nutrients 3. Differentiate into gametes 4. Secrete skeletal elements • calcareous spicules • siliceous spicules • spongin |
| What is the function of a pinacocyte? what group does it belong to? | Porifera - Form the pinacoderm, a layer of cells that cover the external surfaces of sponges |
| What is the function of a spicules? what group does it belong to? | Porifera - hard calcareous or siliceous bodies within the tissue of sponges (and other invertebrates) - gives rigidity and is sharp for predator deterrent |
| What is the function of spongin? | Collagen-like material that forms fibers that form a flexible network in place of muscles |
| 3 classes of porifera? | 1. calcarea (CaCO3 spicules) 2. hexactinellida (siliceous spicules - glass sponges) - think haxa=6 -> 6 sides crystalline structure 3. demospongiae (have siliceous spicules and/or extensive spongin structure) - think demo=people -> sponges people use at home |