If she is now underweight for her height and has very little fat tissue. One would expect Marissa to: be amenorrheic.
Amenorrheic can simply be defined as the absence or lack of menstruation or when a woman has no monthly flow.
This can can tend to occur due to the following:
Therefore one would expect Marissa to: be amenorrheic.
Learn more about Amenorrheic here: https://brainly.com/question/14570313
#SPJ1