Invertebrates worksheet (except Arthropoda and Chordata): Part 1: Porifera and Cnidaria Questions about Porifera (sponges). 1. Describe the path of water flow through a sponge. Use the following vocabulary in your deseription: esculum, incurrent canal, spongocoel, choanscyte. 2. Which cells crease the current that allows sponges to filter-feed? 3. What cells produce spicules and what function de they serve for the spoage? 4. Where do most sponges live (freshwater, marine water, terrestrial)? Questions about Cnidaria 1. Phylum Cnidaria is named fot a distinctive cell known as a caidocyte. What distinctive organelle is present within a cnidocycte cell? Why is this organelle important when considering the predatory life-style of enidanans? 2. What is the typical function of the polyp stage within a cnidarian life-cycle? 3. What is the typical function of the medusa stage within a cnidarian life-cyele? 4. Give a specific example that you saw in lab of a polyp. 5. Give a specific example that you saw in lab of a medusa. 6. Compare the elades Hydrozoa, Scyphozoa and Ambozoa in terms of which stages (polyp, medusa) are present and dominant in the life-cycle. 7. Exanine some representative samples of coral. What is a coral? Do you actually see the animal in these exantpies of coral? What lived in the small holes observed in the coral? Was it a polyp or a medusa? 8. Where do most cnidariaus live (freshwater, marine water, terrestrial)?
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Invertebrates worksheet (except Arthropoda and Chordata)- Part 1- Pori.docx
1. Invertebrates worksheet (except Arthropoda and Chordata): Part 1: Porifera and Cnidaria
Questions about Porifera (sponges). 1. Describe the path of water flow through a sponge. Use the
following vocabulary in your deseription: esculum, incurrent canal, spongocoel, choanscyte. 2.
Which cells crease the current that allows sponges to filter-feed? 3. What cells produce spicules
and what function de they serve for the spoage? 4. Where do most sponges live (freshwater,
marine water, terrestrial)? Questions about Cnidaria 1. Phylum Cnidaria is named fot a
distinctive cell known as a caidocyte. What distinctive organelle is present within a cnidocycte
cell? Why is this organelle important when considering the predatory life-style of enidanans? 2.
What is the typical function of the polyp stage within a cnidarian life-cycle? 3. What is the
typical function of the medusa stage within a cnidarian life-cyele? 4. Give a specific example
that you saw in lab of a polyp. 5. Give a specific example that you saw in lab of a medusa. 6.
Compare the elades Hydrozoa, Scyphozoa and Ambozoa in terms of which stages (polyp,
medusa) are present and dominant in the life-cycle. 7. Exanine some representative samples of
coral. What is a coral? Do you actually see the animal in these exantpies of coral? What lived in
the small holes observed in the coral? Was it a polyp or a medusa? 8. Where do most cnidariaus
live (freshwater, marine water, terrestrial)?
