Which graph best represents directional selection?

A17-year-old primigravida is admitted in early labor. her cervix is 2 to 3 cm dilated and 100% effaced. the fetus is cephalic, and the presenting part is at –1 station. her membranes are intact. the patient is holding her boyfriend's hand tightly and breathing rapidly with each contraction. she tells the nurse in a shaky voice, "i'm so nervous. i've never been in a hospital before. i don't know anything about labor or if i can do this." what is an appropriate nursing diagnosis for this patient?

Once a woman attains puberty, her overuse mature and release one egg per ovarian cycle. which hormone stimulates this event?

Awater molecule is polar because there is an uneven distribution of these between the oxygen and hydrogen atoms.