Anemia can be caused either by a low hematocrit, or by a low hemoglobin level even when the red blood cell count is normal. 

The linea alba is a muscle of the pelvic floor.

The onset of puberty in females typically occurs between the ages of ________ and occurs ________ that in males.

A) 14 and 18; earlier than
B) 13 and 16; later than
C) 11 and 16; earlier than
D) 12 and 16; at the same time as