honbio_animalia

honbio_animalia - Honors Biology : Kingdom Animalia...

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Honors Biology : Kingdom Animalia Chapters 23, 24, 25, 26 *Moderately Topical* Concentrate on themes – not fine details.
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Kingdom Animalia Animals are……. Eukaryotic Sexual (mostly) Usually multicellular (not Myxozoa), Heterotrophic Motile, if only at certain life stages. Embryos pass through a blastula stage , Blastulation
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The current phylogenetic tree for K. Animalia
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Symmetry Radial vs. Bilateral Dorsal (top) Ventral (bottom ) Anterior (front) Posterior (rear)
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Coelomates vs. Acoelomates A coelom is a body cavity. The space, located between an animal’s outer covering and the outer lining of the gut cavity, where internal organs develop. Most bilateral animals, including all the vertebrates, are coelomates.
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Coelomates, pseudocoelomates and acoelomates
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1. According to this phylogenetic tree, how are sponges separated from other animals? Sponges have no true tissues, while other animals do.
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2. Based on this diagram, are arthropods more closely related to roundworms or to echinoderms? Explain. Roundworms; both arthropods and roundworms are protostomes, whereas echinoderms are deuterostomes.
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Invertebrates 1) Phylum Porifera (pore bearer) “sponges” 600 MYA 9000 species No symmetry Sessile Filter feeders Acoelomate
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Simple sponge skeleton with spongin (protein fibers)
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2) Phylum Cnidaria (jellyfish, corals, hydra, sea anemones) 600 MYA 9000 species Acoelomate Radial symmetry Have cnidocytes that have stinging organelles called cnidocysts. Gastrovascular cavity Polyp and/or medusa (stages)
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Cnidarians Hydrozoans
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Scyphozoans (medusa shape)
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Anthozoans polyp, associated with coral, anenome
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Phylum - Cnidarians Phylum - Cnidarians Radial symmetry Radial symmetry Specialized tissues - no organs. Specialized tissues - no organs. Carnivores use stinging cells to Carnivores use stinging cells to capture prey & defend selves.
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Class Hydrozoa - Hydras Class Hydrozoa - Hydras Spend most of life as a polyp Spend most of life as a polyp No true medusa stage No true medusa stage
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Hydrozoans Corals Hydrozoans Corals Coral Reef Video
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Scyphozoans - Jellyfish Scyphozoans - Jellyfish Medusa is large and longer living Medusa is large and longer living Polyp is restricted to a tiny larval stage. Polyp is restricted to a tiny larval stage. Nematocysts (stinging cells on tentacles) of Nematocysts (stinging cells on tentacles) of most most jellyfish are harmless to humans, but a jellyfish are harmless to humans, but a few can cause painful stings. few can cause painful stings.
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Class Anthozoa Anthozoa - Sea - Sea Anenomes Anenomes only the polyp stage in their life cycle. only the polyp stage in their life cycle.
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honbio_animalia - Honors Biology : Kingdom Animalia...

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