Question

Some beetles and flies have antler-like structures on their heads, much like male deer do. the existence of antlers in beetle, fly, and deer species with strong male-male competition is an example of _____. a synapomorphy parsimony homology convergent evolution

Answer 1

The correct answer is "convergent evolution". 

Convergent evolution is defined as the process wherein organisms from different ancestors or even organisms from different phylums in an extent develop similar traits as a result from thriving in the same environment. The most commonly observed example is the flying mechanism shared by insects, birds, bats (mammals), and even pterosaurs (reptiles).