Question

sophie visited a museum and came across a very small marine invertebrate worm. the worm has a translucent body and bristled jaw. the plaque mentioned that the worm produces bioluminescence while attacking its prey. to which phylum does the worm belong?

a. platyhelminthes
b. bryozoa
c. rotifera
d. annelida
e. chaetognatha

Explanation:

Chaetognaths (phylum Chaetognatha) are small, transparent marine worms with bristled jaws (chaetae) used for attacking prey. Platyhelminthes (flatworms) lack bristled jaws. Bryozoa are colonial and not typically described as worms with such jaws. Rotifera have ciliated crowns (corona) not bristled jaws for prey capture. Annelids (segmented worms) have setae but chaetognaths' specific jaw - chaetae structure is distinct.

Answer:

E. Chaetognatha