<![CDATA[                                      Biology With Technology - Amy's Blog]]>Sun, 15 Jun 2025 02:19:07 -0700Weebly<![CDATA[Sponges and Cnidarians]]>Fri, 11 Apr 2014 12:49:52 GMThttp://biologywithtechnology.weebly.com/amys-blog/sponges-and-cnidariansInvertebrate Diversity:

Phylum Porifera
  • No true tissues, and no symmetry
  • No body cavity 
  • There is a central cavity, but not a body cavity 
  • Every cell "fends for itself"
  • No digestive system, no circulatory system
  • Each cell in the animal is on it's own - no way to move materials from cell to cell - uses diffusion
  • Free swimming larva stage, sessile as adults


Great video showing active pumping of water through sponges using dyed water: 
http://vimeo.com/40240443

Phylum Cnidaria
  • jellyfish, hydra, coral, sea anemones
  • Two germ layers
  • radial symmetry
  • no cephalization
  • Incomplete digestive system - only one opening
  • Gastrovascular cavity
  • polyp and medusa stages
  • tentacles
  • nematocysts
Time lapse video showing sea stars, sea urchins, and nemertean worms, etc. moving and eating a dead seal (makes these organisms seem more “alive” to students… also kind of grosses them out)

http://www.youtube.com/watch?v=HG17TsgV_qI

Baker et al. 2004:  Interesting (and fairly straight-forward) article about changes in zooxanthellae composition of corals following bleaching events. The exciting part is that there’s a clade that appears more robust and less susceptible to bleaching events (it’s about time for some good news about the future of corals, isn’t it?!).

https://drive.google.com/file/d/0B9Otn2N-sSitMXotdkJlQjYtMFVDWWRBcWl4R3hfVzJLUkxr/edit?usp=sharing

Excerpt from Jackson et al. 2001: see highlighting on p. 634. This is a fabulous (and sad) paper that reviews many cases of fishing-induced ecosystem collapse. One fascinating part of the paper is that it gives you a feeling for the tremendous diversity and abundance of marine organisms that we had around the US, not too long ago (and… the diversity and abundance that could be restored!).  I’ve highlighted a really interesting section on oysters. It’s easy to underappreciate oysters and the effects of oyster fishing, but this passage (and citations within) are a great place to draw interesting information from. For example, most students would never guess that oysters reefs in Chesapeake Bay were so vast about 100 yrs ago that they probably filtered the “equivalent of the entire water column every 3 days”!

https://drive.google.com/file/d/0B9Otn2N-sSitWnBUOVZNS0dHSmp3aF9nMmFIVDVTTGtZQjY0/edit?usp=sharing


Vocabulary

  1. Larva
  2. Asymmetry
  3. Radial Symmetry
  4. Bilateral symmetry
  5. Cephalization
  6. Coelom
  7. Pseudocoelom
  8. Monoecious
  9. Dioecious
  10. Invertebrate
  11. Spongocoel
  12. Osculum
  13. Spicules
  14. Choanocyte
  15. Budding
  16. Spongin
  17. Polyp
  18. Tentacles
  19. Medusa
  20. Nematocyst
  21. Gastrovascular cavity
  22. Epidermis
  23. Gastrodermis
  24. Mesoglea
]]><![CDATA[Day 24 April 24th Chapter 16]]>Tue, 24 Apr 2012 17:56:25 GMThttp://biologywithtechnology.weebly.com/amys-blog/day-24-april-24th-chapter-16
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]]><![CDATA[Day 23 April 19th Chapter 16]]>Thu, 19 Apr 2012 17:53:50 GMThttp://biologywithtechnology.weebly.com/amys-blog/day-23-april-19th-chapter-16
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]]><![CDATA[Day 22 April 17th Chapters 14 + 15]]>Tue, 17 Apr 2012 17:45:27 GMThttp://biologywithtechnology.weebly.com/amys-blog/day-22-april-17th-chapters-14-15
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]]><![CDATA[Day 21 April 12th Chapter 14]]>Thu, 12 Apr 2012 17:49:20 GMThttp://biologywithtechnology.weebly.com/amys-blog/day-21-april-12th-chapter-14
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]]><![CDATA[Clicker detail for Unit Three]]>Thu, 12 Apr 2012 15:39:32 GMThttp://biologywithtechnology.weebly.com/amys-blog/clicker-detail-for-unit-threeThis spreadsheet is the details of your clicker participation for Unit Three. It shows how many clicker questions you answered, and the totals are at the end of the line.

I will be making another doc with the number of DAYS you have participated. That is what will go in for your "participation grade" in your final grade.

Yes, I know the below spreadsheet is small. You'll need to download it, and open in Adobe to zoom.
]]><![CDATA[Day 20 April 10th Chapter 14]]>Tue, 10 Apr 2012 18:06:13 GMThttp://biologywithtechnology.weebly.com/amys-blog/day-20-april-10th-chapter-14
]]><![CDATA[Excel Spreadsheet to figure out your grade]]>Tue, 10 Apr 2012 17:14:40 GMThttp://biologywithtechnology.weebly.com/amys-blog/excel-spreadsheet-to-figure-out-your-grade
nsb_lecture_grade_formula_sp_12.xls
File Size: 25 kb
File Type: xls
Download File
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]]><![CDATA[Exam 3 Practice Questions]]>Tue, 03 Apr 2012 17:24:53 GMThttp://biologywithtechnology.weebly.com/amys-blog/exam-3-practice-questions
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]]><![CDATA[preliminary study guide]]>Tue, 27 Mar 2012 19:19:43 GMThttp://biologywithtechnology.weebly.com/amys-blog/preliminary-study-guide
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