5' Phylogeny

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5. Phylogeny
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II. Animal Diversity A. Sponges
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II. Animal Diversity A. Sponges -
asymmetrical
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II. Animal Diversity A. Sponges -
asymmetrical - simple tissues loosely integrated
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II. Animal Diversity A. Sponges -
asymmetrical - simple tissues loosely
integrated - cell types choanocytes line
cavity absorb food epidermal cells on outer
surface mesohyll contains supporting soft
spongin fibers and rigid, silicaceous spicules.
Also, ameoboid cells that transfer food from
choanocytes to outer cells.
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II. Animal Diversity A. Sponges -
asymmetrical - simple tissues loosely
integrated - cell types choanocytes line
cavity absorb food epidermal cells on outer
surface mesohyll contains supporting soft
spongin fibers and rigid, silicaceous spicules.
Also, ameoboid cells that transfer food from
choanocytes to outer cells. - reproduce
asexually (frag.) and sexually
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II. Animal Diversity B. Radiata
Cnidarians 1. Diversity - Hydras
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II. Animal Diversity B. Radiata
Cnidarians 1. Diversity - Hydras - Jellyfish
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II. Animal Diversity B. Radiata
Cnidarians 1. Diversity - Hydras -
Jellyfish - Anemones
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II. Animal Diversity B. Radiata
Cnidarians 1. Diversity - Hydras -
Jellyfish - Anemones - Corals
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II. Animal Diversity B. Radiata
Cnidarians 2. Body Plan diploblastic two
tissue layers (ectoderm and endoderm)
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II. Animal Diversity B. Radiata
Cnidarians 2. Body Plan - diploblastic two
tissue layers (ectoderm and endoderm) -
gastrovascular cavity - ameoboid cells in
mesoglia
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II. Animal Diversity B. Radiata
Cnidarians 2. Body Plan - diploblastic two
tissue layers (ectoderm and endoderm) -
gastrovascular cavity - ameoboid cells in
mesoglea - cnidocytes with nematocysts
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II. Animal Diversity B. Radiata
Cnidarians 2. Body Plan - diploblastic two
tissue layers (ectoderm and endoderm) -
gastrovascular cavity - ameoboid cells in
mesoglea - cnidocytes with nematocysts -
Hydra and jellies alternate between polyp and
medusa stages coral and anemones have only polyps
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II. Animal Diversity C. Bilateria
Triploblastic gastrulation and mesoderm
formation (acoelomate, pseudocoelomate, or
eucoelomate)
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II. Animal Diversity C. Bilateria
Triploblastic gastrulation and mesoderm
formation (acoelomate, pseudocoelomate, or
eucoelomate) Bilaterally Symmetrical head
and top concentration of sensory systems at
front cephalization
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II. Animal Diversity C. Bilateria 1.
Protostomes blastopore forms mouth a.
Lophotrochozoans b. Ecdysozoans 2.
Deuterostomes blastopore forms anus a.
Echinodermata b. Hemichordata c. Chordata
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II. Animal Diversity a. Lophotrochozoans -
Lophophore (feeding structure) or trochophore
larvae
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II. Animal Diversity a. Lophotrochozoans
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II. Animal Diversity a. Lophotrochozoans 1.
Platyhelminthes a. Diversity -
Planarians (free-living)
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II. Animal Diversity a. Lophotrochozoans 1.
Platyhelminthes a. Diversity -
Planarians - Tapeworms - parasitic
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II. Animal Diversity a. Lophotrochozoans 1.
Platyhelminthes a. Diversity -
Planarians - Tapeworms - parasitic - Flukes
parasitic
Complex life cycles
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II. Animal Diversity a. Lophotrochozoans 1.
Platyhelminthes b. body plan -
bilateral - nerve net cephalized nerve
ring
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II. Animal Diversity a. Lophotrochozoans 1.
Platyhelminthes b. body plan -
bilateral - nerve net cephalized nerve
ring - acoelomate deep tissues
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II. Animal Diversity a. Lophotrochozoans 1.
Platyhelminthes b. body plan -
bilateral - nerve net cephalized nerve
ring - acoelomate deep tissues -
pharynx and convoluted gut convoluted gut serves
to distribute nutrients to deep tissuesacts as
a vascular (distributive) system so the gut is
called a gastrovascular cavity.