b) If a parasitic insect were to be introduced into this ecosystem and eventually cause the extinction of orchids with deep nectar pools,what would happen to the humming bird beak length distribution within the population (use a graph to help to explain your answer.)? What pattern of selection is influencing begls length in this situation? (4 marks) 3) The Panama canal is a man made channel which connects the Atlantic ocean to the Pacific ocean Humans dug out a large band of earth through Panama which then filled with ocean water to connect the two oceans. This was done in an effort to create shorter shipping routes for large container ships which would otherwise be forced to go around South America The creation of this channel severed the land in to two masses and allowed the two oceans to meet. a) How might the construction of the Panama canal have influenced the evolution of terrestrial species in its vicinity? What mode of speciation may be in effect? (4 marks)