Most organs are innervated by neurons from both the sympathetic and parasympathetic nervous systems, a phenomenon referred to as . i. dual innervation
ii. antagonism
iii. sympathetic tone

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. this is an example of speciation.

Acommon kind of mechanical weathering is called

Which locations on the map are low-pressure areas? a b c d e