Annelida, and others (Lecture 6) - BIO 342 questions with correct answers
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Course
Bio 342
Institution
Bio 342
Trochophore development Correct Answer-Annelida
• Anterior of the Prototroch becomes the prostomium
• Teloblastic growth
• Pygidium: derived from below the Telotroch
Annelida Correct Answer-• Trochophore larva
• Segmentation
• Teloblastic growth
• 4 bundles of chaetae per seg...
Annelida, and others (Lecture 6) - BIO 342 questions
with correct answers
Trochophore development Correct Answer-Annelida
• Anterior of the Prototroch becomes the prostomium
• Teloblastic growth
• Pygidium: derived from below the Telotroch
Annelida Correct Answer-• Trochophore larva
• Segmentation
• Teloblastic growth
• 4 bundles of chaetae per segment (NOT setae)
Prostomium Correct Answer-Annelida
• First segment of trunk
• Around the mouth
Teloblastic growth Correct Answer-Annelida
• How the trunk grows
• Grows anterior to posterior end during embryonic development
• It is extending itself at the end
Pygidium Correct Answer-Annelida
• Derived from below the Telotroch
, • Possesses the anus
Segmentation in Annelids Correct Answer-• Repetition of structures
• Each segment is individual unit (specialized structures within)
• Isolated by septum
• Gut, nerve cord, and blood vessel pass through septum
• Important for movement
Chaetae Correct Answer-Annelida
• Extends from the body
• Has canals in it
• Made of Beta-chitin
• Muscles associated with it, to let it extend, retract, and move
• Extend surface area to help move
• Variety of forms
Polychaeta Correct Answer-• Parapodia
• Nuchal organ
Parapodia Correct Answer-Polychaeta
• Foot like extensions coming off the side
• Chatae are associated with the parapodia
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