General Characteristics
What is the Inner cell layer of the worm?
Endoderm
(True or False) Tapeworms have digestive systems.
False
How do ribbon worms sexually reproduce?
Through external fertilization & development
What are the most numerous worms in the sea?
Roundworms
What is the Phylumn from Arrow Worms?
Chaetognatha or Chaetognaths
What is the Outer cell layer of the worm?
Ectoderm
Planaria feeds on what?
Small organisms & Organic debris
What do ribbon worms feed on?
Small Fish & Polychaete
What circulatory & respiratory systems do they have?
(Trick Question) They don't have any.
How do Arrow worms sexually reproduce?
cross-fertilization of eggs in water
What is the middle cell layer in worms?
Mesoderm
How do you prevent tapeworms?
Cook Meat Well
How do ribbon-worms reproduce asexually?
Through Regeneration from Pieces
What do Round Worms feed on?
Organic Debris
Where do giant tube worms live?
In Hydrothermal Vents
What type of movement does the worm have? (This is according to the notes)
Slow
Where is the mouth of planarians?
On the ventral (lower) surface
What type of digestion do ribbon worms have?
Extracellular Digestion
Where do Round Worms live?
In sand and mud at the bottom of the sea.
What type of nervous system do arrow worms have?
Simple nervous system w/ two light-sensitive eyes & sensory projections on the surface body
List two characteristics of the body of the worm.
Soft, Moist
What type of digestive tract does Planaria have?
Two-way digestive tract (unlike others)
What is the sharp sticky extension called in a roundworm?
Proboscis
(True or False) Roundworms are free-living.
True
What is hydrogen sulfide in hydrothermal vents used for?
For chemosynthesis to produce energy-rich food