A) Females typically invest more energy into offspring than do males.
B) Females typically are smaller than males.
C) Males and females typically differ in their lifetime number of mates.
D) Sperm competition is unimportant.
E) Sex-role reversed species do not exist.

A) Male aggressive polygynandry
B) Female passive polyandry
C) Female defense polygyny
D) Male dominance polygyny
E) Male-female plural breeding

A) Female defense polygyny
B) Female passive polyandry
C) Male aggressive polygynandry
D) Male dominance polygyny
E) Male-female plural breeding