(Question)
Q: Toward the late stages of pregnancy, a drop in progesterone and stretching forces from the fetus lead to increasing uterine irritability and prompt labor. contractions serve to dilate the cervix and expel this? Choices: - blood - tissues - uteris - newborn A:
(Answer)
newborn

(Question)
Q: Birds have a relatively large heart and a rapid what? Choices: - lifespan - blink rate - digestive process - heart rate A:
(Answer)
heart rate

(Question)
Q: What is the term for the method of sending out ultrasound waves to determine the locations of objects? Choices: - catabolism - magnetism - morphology - echolocation A:
(Answer)
echolocation