What hormone stimulates the milk-ejection reflex?
A. antidiuretic hormone
B. oxytocin
C. vasopressin
D. parathyroid hormone
E. aldosterone
B. oxytocin
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In a chemical reaction, the standard free energy change (?G°') is calculated to be 3.67 cal/mol. What can be said of the chemical reaction?
A) The reaction is at equilibrium under standard conditions. B) The reaction goes spontaneously to the right under standard conditions. C) The reaction is not spontaneous under standard conditions. D) Products predominate over reactants at equilibrium under standard conditions. E) There can be no reaction.
In response to gonadotropin releasing hormone (GnRH), the anterior pituitary secretes:
a. estrogen or testosterone b. sex stimulating hormone c. progesterone d. leutinizing hormone and follicle-stimulating hormone e. prolactin
Scientists have determined that the silversword alliance is most closely related to the tarweed based on
a. phylogenetic similarities. b. molecular comparisons. c. the ability of the two plants to interbreed. d. their geographical closeness. e. seed shape and color.
Argentine fire ants entered the United States in
the a. 1920s. b. 1930s. c. 1940s. d. 1950s. e. 1960s.