 | disappearance of unimportant traits, 28, 33
|
 | distal explanations, 26
|
 | effect of climate on monogamy, 37
|
 | horses and, 28
|
 | human nature and, 26
|
 | male moth and, 2627
|
 | natural selection and, 2729
|
 | proximal explanations, 26
|
 | sex-linked behavioral characteristics, 31, 3233, 3435, 175
|
 | sex-linked physical characteristics, 31, 32, 34
|
 | sexual selection and, 2933
|
 | speech and human advancement, 195
|
 | testosterone and, 27,2829, 3536
|
|