According to the article The Nose Knows about the ability of mothers to detect the scent of their babies, in the main study, infant odors were collected from:

In the example in which the relation between Hanta virus and a drug is explored,

the key cell to assess the relationship is (a) the number of Hanta-infected people receiving the drug and six months later were alive (b) the number of Hanta-infected people receiving the drug and six months later were dead (c) the number of Hanta-infected people not receiving the drug and six months later were alive (d) the number of Hanta-infected people not receiving the drug and six months later were dead (e) all of the above

According to the authors of your text, the available evidence about prehistoric sexuality is best summarized by which of the following?

A) Prehistoric males dominated females in all aspects of their culture, as shown by male symbols of power in ancient art. B) There was a division of labor between men and women, and early art symbolized female (and later, male) contributions to fertility. C) Although ancient men and women frequently engaged in sexual behavior, they did not understand its link to childbearing. D) Ancient people experienced frequent deaths, short-term pairings of men and women, and rarely had children that survived.