Quiz
ZOO201 Practical 16
PDF 733 KB
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- Type
- Quiz
- Course
- ZOO201 Animal Diversity: Invertebrates
- Size
- PDF 733 KB
- Updated
- 23 Oct 2026
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- Triploblastic, lack segmentation, coelomate
- Pentaradial symmetry in adults and bilateral in larval forms
- Calcareous endoskeleton known as the test or ossicles with protruding spines
- Ventral surface called the oral surface where mouth is located
- Dorsal surface known as aboral surface where anus is located
- Have a nervous system but no head or brain in adults
- No circulatory, respiratory, or excretory systems
- Capable of extensive regeneration
- Free-swimming larva to sessile or sedentary adult
- Have a network of water-filled canals called the water vascular system to help move and feed
- Tube feet on the underside of arms help in moving and feeding
- One-way digestive system consists of mouth with oral spines, gut and anus
- Separate sexes
- Reproduce sexually and asexually
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