Transcript
Page 1: Animals - Deuterostomes

Animals - Deuterostomes

Chapter 30

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Characteristics

Similarities in embryonic development:

Radial cleavage Indeterminate cleavage Blastopore becomes the anus Pharyngeal slits

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Echinoderms: Spiny-skinned animals

Sea lilies, feather stars, sea stars, brittle stars, sea urchins, sand dollars, sea cucumbers, sea daisies

Endoskeleton covered by a thin epidermis

Water vascular system Radial symmetry All are marine

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Chordates

Tunicates, Lancelets, and vertebrates

Four characteristics:1. Notochord2. Dorsal tubular nerve cord3. Pharyngeal slits4. Postanal tail

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Cartilagenous fish – Sharks, skates, & rays

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Bony Fish – most fish are in this group

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Frogs – have smoother skin than Toads

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Salamanders & Newts

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Caecilian

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Modern Reptiles

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Birds

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Along came mammals: Monotremes lay eggs

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Marsupials: Pouched Mammals

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Placental Mammals


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