During puberty, the secretion of GnRH causes the secretion of ________, which in turn stimulate(s) the production of sex hormones
A) LH and FSH
B) oxytocin and prolactin
C) insulin
D) growth hormone
E) oxytocin and growth hormone
A
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To know that the 13 finch species that inhabit the Galápagos are descended from a common ancestor,
biologists had to rely on ____.
a. Darwin's notebooks describing his observations b. comparative molecular biology c. comparative embryology d. Mendelian genetics e. modern historical biogeography and Darwin's observations
If you eliminated all sources of calcium (dairy products, some vegetables) from your diet, the level of
which of the following would rise in an attempt to supply calcium stored in your body to the tissues that need it? a. aldosterone b. calcitonin c. mineralocorticoids d. parathyroid hormone e. angiotensin
Jacob and colleagues developed a bacterial linkage map based on time. What kind of recombination was used?
What will be an ideal response?
The sex of most mammals, birds, and insects is determined by:
a. the temperature. b. the external environment. c. sex chromosomes. d. chance. e. the internal envronment.