AT&T; LTE 3:10 PM Ch32 33 Objectives for Animals.doc ?? Porifera 10. Be able to

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AT&T; LTE 3:10 PM Ch32 33 Objectives for Animals.doc ?? Porifera 10. Be able to group animal phyla according to the 4 animal body plan features (see#8) 11. What are characters that are specific to sponges? 12. How do they digest food? How do they reproduce? Cnidaria 13. Be able to group animal phyla according to the 4 animal body plan features (see#8) 14. What are characters that are specific to cnidarians? (see#8) 15. How do they digest food? How do they reproduce? 16. What is a nerve net? How do they move? 17. Know the 3 different classes of cnidarians and what characters they possess that put them in those classes. Protostomes in general 18. What morphological characters would place an animal phylum in the group Lophotrochozoa? Does an animal need to have both of those traits to be in this group? 19. What trait would place an animal in the Ecdysozoa? 20. Know the definitions for the following terms: lophophore, trochophore larva, ecdysis, segmentation. Know which of these terms apply to each of the phyla we talk about in lecture. Practice placing these characters on the phylogenetic tree of animals. 21. How are pseudocoeloms different from coeloms? Are they different in structure? In function? What are the 3 main functions of a coclom? What advantages woulda triploblast with a coelom have over a diploblast like a Previous Next Courses Calendar To Do Notifications Messages

Explanation / Answer

1. Symmetry: asymmetrical

Level of organization: tissue

Habitat: most aquatic systems

Poriferan Reproduction:

Asexually: Budding and regeneration

Sexually: Sponges are usually hermaphroditic (monoecious)

Viviparous sponges: retain and nurture zygote until it is shed as motile, ciliated larvae

Oviparous: shed eggs and sperm smoothly into the water

3. Sponges have a different feeding system among animals. Rather than mouth they have tiny pores (ostia) in their outer walls by which water is drawn. the water is pumped through the body and the osculum as Cells in the sponge walls filter food from the water.

reproduction : Asexually: Budding and regeneration

Sexually: Sponges are normally hermaphroditic (monoecious)

Viviparous sponges: preserve and nourish zygote until it is shed as moving, ciliated larvae

Oviparous: cast eggs and sperm freely into the water

4. Radial Symmetry

Levels of organization: true tissues, some simplistic organizations

Habitat: mostly marine (hydras = freshwater)

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