I need help with this please:

Construct at least two possible hypotheses for the student’s experiment.

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm

Anurse is caring for a 42-year-old client who is scheduled for an amniocentesis during the fifteenth week of gestation because of concerns regarding down syndrome. what other fetal problem does an examination of the amniotic fluid reveal at this time?