The document contains questions related to the biology of invertebrates, specifically focusing on Porifera (sponges) and Cnidaria (jellyfish, corals). It covers topics such as water flow in sponges, the roles of various cells, life-cycle stages in cnidarians, and examples observed in a lab setting. Additionally, it addresses the habitats of these organisms and their structural characteristics.

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)?