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Questions and Answers
What type of cellular organization do Parazoa exhibit?
What type of cellular organization do Parazoa exhibit?
- Cellular level organization (correct)
- Organ-level organization
- Molecular level organization
- Tissue-level organization
Which of the following statements is true regarding Metazoa?
Which of the following statements is true regarding Metazoa?
- They are exclusively aquatic.
- They lack cellular differentiation.
- Their cells do not form tissues.
- They include Triploblastic and Diploblastic animals. (correct)
Which level of organization pertains to organisms with three cell layers?
Which level of organization pertains to organisms with three cell layers?
- Bilateral organization
- Triploblastic organization (correct)
- Quadriploblastic organization
- Dorsal organization
What type of environments do Protozoa primarily inhabit?
What type of environments do Protozoa primarily inhabit?
What distinguishes the reproductive life cycles of Parazoa?
What distinguishes the reproductive life cycles of Parazoa?
Flashcards
Parazoa
Parazoa
Multicellular invertebrates with collared flagellated cells, their bodies are not organized into tissues or organs.
Diploblastic
Diploblastic
Animals with two cell layers (endoderm and ectoderm), showing tissue-level organization.
Triploblastic
Triploblastic
Animals with three cell layers (endoderm, ectoderm, and mesoderm), showing organ-level organization.
Protozoa
Protozoa
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Protozoa habitats
Protozoa habitats
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Study Notes
Animal Classification
- Gametes and agametes are formed from specialized cells, forming the central body mass
- Life cycles alternate between asexual and sexual generations
- Most are marine organisms
- Parazoa exhibit multicellular structure with collared flagellated cells
- Lack organization into tissues or organs; exist at the cellular level
Metazoa
- Invertebrates with cellular differentiation
- Two levels of organization within the group:
- Diploblastic includes animals with two-cell layers (endoderm and ectoderm) at the tissue level
- Triploblastic includes animals with three cell-layers (endoderm, ectoderm, and mesoderm) at the organ level
- Mesoderm is more extensive and contains vital organs/organ systems
- The Protozoa
- Simple, primitive organisms
- Belong to the Eukaryotae superkingdom and Protoctista kingdom
- Resemble animals
- Primarily aquatic organisms (watery or moist environments)
- Found in various locations (sea, freshwater, soil, body fluids)
- Distributed worldwide (cosmopolitan)
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