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Questions and Answers
What distinguishes animals in the clade Bilateria?
What distinguishes animals in the clade Bilateria?
- Presence of a body cavity (coelom) (correct)
- Absence of a digestive tract
- Muscle tissues originating from endoderm
- Exclusively radial symmetry
Cephalization involves the concentration of what in the anterior region of bilaterians?
Cephalization involves the concentration of what in the anterior region of bilaterians?
- Digestive structures
- Neural ganglia (correct)
- Muscle tissues
- Reproductive structures
Which term describes the body plan involving ecto-, endo-, and mesoderm in animals?
Which term describes the body plan involving ecto-, endo-, and mesoderm in animals?
- Diploblastic
- Acoelomate
- Pseudocoelomate
- Triploblastic (correct)
What genetic elements regulate the anterior-posterior differentiation during embryonic development in bilaterians?
What genetic elements regulate the anterior-posterior differentiation during embryonic development in bilaterians?
What differentiates sessile shellfish from other bilaterians in terms of cephalization?
What differentiates sessile shellfish from other bilaterians in terms of cephalization?
Which phylum is considered basal to other bilaterians according to molecular phylogenetic analyses?
Which phylum is considered basal to other bilaterians according to molecular phylogenetic analyses?
What is a characteristic shared by all Acoela species?
What is a characteristic shared by all Acoela species?
Which of the following is NOT a characteristic of Lophotrochozoa?
Which of the following is NOT a characteristic of Lophotrochozoa?
What is a common feature of Acoela species' bodies?
What is a common feature of Acoela species' bodies?
Which clade contains Lophotrochozoa, Ecdysozoa, and Deuterostomia?
Which clade contains Lophotrochozoa, Ecdysozoa, and Deuterostomia?
What is unique about the way Acoela species digest their food?
What is unique about the way Acoela species digest their food?
How many phyla are included in the Lophotrochozoa clade?
How many phyla are included in the Lophotrochozoa clade?
What does the term 'platyhelminthes' mean?
What does the term 'platyhelminthes' mean?
What is a distinctive feature of the digestive tract in flatworms?
What is a distinctive feature of the digestive tract in flatworms?
How do flatworms carry out gas exchange?
How do flatworms carry out gas exchange?
Which subdivision of Phylum Platyhelminthes includes a low diversity group found in freshwater habitats and reproduces asexually by budding?
Which subdivision of Phylum Platyhelminthes includes a low diversity group found in freshwater habitats and reproduces asexually by budding?
What are planarians, well-known free-living Rhabditophora, known for preying on?
What are planarians, well-known free-living Rhabditophora, known for preying on?
Which structure do flatworms lack, which is important for circulatory and gas exchange systems in other more complex animals?
Which structure do flatworms lack, which is important for circulatory and gas exchange systems in other more complex animals?
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