Human beings show
a. no trends toward seasonality in birth rates.
b. mild trends toward seasonality in birth rates.
c. strong trends toward seasonality in birth rates.
d. strong trends toward seasonality in birth rates in countries near the equator, but weak trends toward seasonality in countries located near the poles of the earth.
Question 2
The hypothalamus controls the release of sex hormones by secreting
a. melatonin.
b. luteinizing hormone (LH) and follicle-stimulating hormone (FSH).
c. GnRH.
d. 5-alpha reductase.