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Big ideas

Big ideas. The process of evolution drives the diversity and unity of life. Biological systems utilize free energy and molecular building blocks to grow, reproduce and maintain homeostasis. Living systems store, retrieve, transmit and respond to information essential to life processes.

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Big ideas

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  1. Big ideas • The process of evolution drives the diversity and unity of life. • Biological systems utilize free energy and molecular building blocks to grow, reproduce and maintain homeostasis. • Living systems store, retrieve, transmit and respond to information essential to life processes. • Biological systems interact, and these systems possess complex properties.

  2. 1. What are sponges?

  3. 1. What are sponges? 2. General traits 3. invertebrate animal- no backbone 3. multicellular eukaryotes

  4. 1. What are sponges? 2. specialized cells, but NO tissues (tissues = groups of cells with the same job) 3. two layers of cells separated by jellylike mesoglea

  5. 2. Sponges evolved during Paleozoic Era (540 mya) from flagellated protozoa

  6. 1. How do sponges gather food for energy ? 2. water enters ostia (tiny pores) and Exits osculum (large pore)----filter food out 2. Collar cells w/flagella pulls in water

  7. Water carries food in & gases in, and wastes and gases away.

  8. Video clip of sponges feeding

  9. 1. How do sponges gather food for energy ? 2. digestion occurs inside each cell 3. NO DIGESTIVE SYSTEM OR ORGANS 2. Special cells carry food to cells. 3. NO BLOOD

  10. 1. How do sponges build bodies? 2. Skeletal structure of sponges 3. spicules (of hard silica) and spongin (of soft protein) 3. skeleton made by special cells

  11. 1. How do sponges transmit genetic info? 2. Reproduction in sponges 3. asexually w/ budding 3. sexually w/ sperm & egg http://www.wingswildlife.com/video_clips/PB02_057

  12. 2. Development of a sponge 3. zygote (fertilized egg) develops by mitosis 3. zygote develops into swimming larva… 3. larva attaches to rock & grows into sessile sponge

  13. 1. Why are sponges important? 2. habitat for animals 2. symbiotic relationships w/ algae & bacteria 2. toxins for medicine

  14. Open note quiz sponges 1 • 1. What is an invertebrate? • 2. The jellylike material between the ectoderm and endoderm of a sponge is called: • 3. Pores that allow water into a sponge are called:

  15. 4. T/F A sponge has tissues and systems. • 5. A sponge is a (heterotroph, autotroph) • 6. Carl Linnaeus introduced the terms genus and _________________.

  16. Labs: • 1. Does a synthetic sponge or real sponge hold more water?

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