What term was used by nineteenth-century explorers and missionaries to describe native americans who were neither male nor female but somehow both? a. transsexuals b. queers c. berdaches d. transvestites?

The correct answer is d. In modern times, the term "transvestite" signifies a man who dresses up and/or acts like a woman, or a woman who dress up and/or acts like a man. This term can have very negative connotations. Currently, we use the word "intersex" to describe someone who has both male and female genitalia.