What happened to glacier bay alaska after deglaciation

Abnormal softening of a gland is known as

Question#29: why does the tropical ocean have a greater temperature range than the temperate ocean?

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