A glucagon hormone is a molecule that stimulates a reaction inside liver cells. Based on the diagram, where do you think a glucagon hormone most likely binds to send its signal to the cell?

Which of the following can occur to two segments of a population if they are geographically isolated 1.) they can only share some types of genes 2.)both groups most likely become extinct 3.)they find a way to come back together 4.)eventually they become separate species