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Short Answers. 1. The birth control pills most commonly used in the US today are mixtures of estrogen-like and progesterone-like compounds. They probably prevent pregnancy by what method? Explain. 2. At the age of 9 years old, a young girl was taken to a doctor who suspected that she has some sort of endocrine deficiency. At that time she was only 36 inches tall, although correctly proportioned. By age 17, she was only as tall as a 9 year old. There was no sexual development during her adolescent years. What type of endocrine deficiency might she have? b. What hormones is she not producing? c. What other symptoms might she have? d. If you were a doctor, what hormonal therapy might you prescribe? 3. Briefly, compare adaptations for nutrient uptake and processing in: a. hydra b. earthworm c. insect d. cow e. human