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30 Cards in this Set

  • Front
  • Back
Ingestion?
Eating other organisms or organic material that is decomposing.
Cleavage?
A succession of mitotic cell divisions that leads to tyhe formation of a multicellular stage called Blastula.
Blastula?
Cleavages lead to this multicellular stage that forms a hollow ball.
Gastrulation?
Layers of embryonic tissue that are produced will develop into adult body parts.
Gastrula?
The two layered, cup shaped embyronic stage.
Larva?
Sexuall immature form, morphologically distinct fromt he adult stage. They usually eat different food and may even have a different habitat than adults.
Metamorphosis?
A resurgence of development that transforms the animal into an adult.
Order of early embryonic development?
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.
Larval stages?
Larva goes through metaporhposis to mature into an adult.
Grade?
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.
Parazoans?
Members of the subkingdom of animals consisting of sponges.
Eumetazoans?
Members of the subkingdom that includes all animals except sponges.
Radial Symmetry?
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.
Radiata?
Member of the radially symmetrical animal phyla, including cnidarians.
Bilateral Symmetry?
A body form with a central longitudinal plan that divides the body into two equal but opposite halves.
Dorsal?
The back of a bilaterally symmetrical animal.
Ventral?
The underside or botton of a bilaterally symmetrical animal.
Anterior?
The head end of a bilaterally symmetrical animal.
Posterior?
The rear or tail of a bilaterally symmetrical animal.
Bilateria?
Members of a branch of eumetazoans possessing bilateral symmetry.
Parazoans?
Members of the subkingdom of animals consisting of sponges.
Eumetazoans?
Members of the subkingdom that includes all animals except sponges.
Radial Symmetry?
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.
Radiata?
Member of the radially symmetrical animal phyla, including cnidarians.
Bilateral Symmetry?
A body form with a central longitudinal plan that divides the body into two equal but opposite halves.
Dorsal?
The back of a bilaterally symmetrical animal.
Ventral?
The underside or botton of a bilaterally symmetrical animal.
Anterior?
The head end of a bilaterally symmetrical animal.
Posterior?
The rear or tail of a bilaterally symmetrical animal.
Bilateria?
Members of a branch of eumetazoans possessing bilateral symmetry.