Mucous membranes and the skin are nonspecific defenses against infection. The functions of the skin in immunity are to block the entry of pathogens and to —

answers:
release white blood cells

produce antibodies

secrete sweat and oil

activate active immunity

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.