All tests that have been shown to be statistically reliable, must also be

A(n) ________ effect would be seen when a student enhances his or her recall of material by frequently assessing themselves using quizzes or other forms of feedback

a) repetition b) test c) practice d) eidetic

The ________ is primarily responsible for the filtering and passage of incoming nutrients and outgoing wastes for the embryo

A) placenta B) umbilical cord C) amniotic sac D) amniotic fluid