Sometimes when a new mother is nursing her baby, she experiences abdominal cramping. Which hormone is responsible?
A) Estrogen B) Progesterone C) FSH D) Oxytocin E) Prolactin
D
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In Fredrick Griffith's classic experiments,
A. mice injected with strain R cells died of pneumonia. B. mice injected with strain S cells died of pneumonia. C. mice injected with live strain R cells and heat-killed strain S cells died of pneumonia. D. mice injected with strain S cells, or live strain R cells and heat-killed strain S cells died of pneumonia. E. mice injected with strain R cells, or live strain R cells and heat-killed strain S cells died of pneumonia.
The PCR method was developed by ________.
A. Sanger B. Cohen C. Mullis D. Boyer
In C. elegans ced-9/ced-3 double mutants
A. all 1090 cells live. B. all 1090 cells die. C. only 959 cells live. D. 131 cells always die.
White blood cells are a type of
A) Connective tissue B) Epithelial tissue C) Muscle tissue D) Nervous tissue