Mutations in the BRCA1 or BRCA2 genes are . Multiple choice question. controllable factors present in over 50 percent of all breast cancer cases rare in the general population typically the result of exposure to environmental factors

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction.