The first systematic surveys of sexual behavior were published in the mid-1900s by:

A biological cycle, or rhythm, that is roughly 24 hours long is called a(n) _____rhythm

A) infradian B) circadian C) diurnal D) ultradian

Oshi, a Navajo woman, has just delivered her baby, followed by the placenta. The placenta will most likely be _________

left on the forest floor. sealed in a sacred jar. placed in a hollow tree. buried in a sacred place.