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30 Cards in this Set
- Front
- Back
Ingestion?
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Eating other organisms or organic material that is decomposing.
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Cleavage?
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A succession of mitotic cell divisions that leads to tyhe formation of a multicellular stage called Blastula.
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Blastula?
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Cleavages lead to this multicellular stage that forms a hollow ball.
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Gastrulation?
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Layers of embryonic tissue that are produced will develop into adult body parts.
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Gastrula?
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The two layered, cup shaped embyronic stage.
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Larva?
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Sexuall immature form, morphologically distinct fromt he adult stage. They usually eat different food and may even have a different habitat than adults.
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Metamorphosis?
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A resurgence of development that transforms the animal into an adult.
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Order of early embryonic development?
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Samll flagellated sperm fertilizes a larger nonmotile egg to form a diploid zygote. Zygote undergoes cleavage, and leads to the formatiuon of blastula. Following this is the gastrulation stage.
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Larval stages?
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Larva goes through metaporhposis to mature into an adult.
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Grade?
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Each major branch in an animal phylogenetic tree is called this, and it is defined by certain body-plan features shared by the animals belonging to that branch.
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Parazoans?
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Members of the subkingdom of animals consisting of sponges.
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Eumetazoans?
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Members of the subkingdom that includes all animals except sponges.
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Radial Symmetry?
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Body shaped like a pie or a barrel, with many equal parts radiating outward like the spokes of a wheel; present in cnidarians and echinoderms.
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Radiata?
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Member of the radially symmetrical animal phyla, including cnidarians.
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Bilateral Symmetry?
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A body form with a central longitudinal plan that divides the body into two equal but opposite halves.
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Dorsal?
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The back of a bilaterally symmetrical animal.
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Ventral?
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The underside or botton of a bilaterally symmetrical animal.
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Anterior?
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The head end of a bilaterally symmetrical animal.
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Posterior?
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The rear or tail of a bilaterally symmetrical animal.
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Bilateria?
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Members of a branch of eumetazoans possessing bilateral symmetry.
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Parazoans?
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Members of the subkingdom of animals consisting of sponges.
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Eumetazoans?
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Members of the subkingdom that includes all animals except sponges.
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Radial Symmetry?
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Body shaped like a pie or a barrel, with many equal parts radiating outward like the spokes of a wheel; present in cnidarians and echinoderms.
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Radiata?
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Member of the radially symmetrical animal phyla, including cnidarians.
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Bilateral Symmetry?
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A body form with a central longitudinal plan that divides the body into two equal but opposite halves.
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Dorsal?
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The back of a bilaterally symmetrical animal.
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Ventral?
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The underside or botton of a bilaterally symmetrical animal.
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Anterior?
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The head end of a bilaterally symmetrical animal.
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Posterior?
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The rear or tail of a bilaterally symmetrical animal.
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Bilateria?
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Members of a branch of eumetazoans possessing bilateral symmetry.
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