Use the following scenario to answer question.
Island chains are known to occur along the borders of theearth’s large land plates. For example, both the Hawaiian andGalapagos Islands were born from the intense volcanic activitygenerated along the Pacific Ocean’s “Ring of Fireâ€. Hence, thenumber and placement of the islands can tell us approximately howmany of the underwater volcanoes made islands and in what directionthe plates are moving. Once formed, an island, then undergoescolonization by living organisms. We often describe a successfulcolonization event as one where the species lands, breeds and itsoffspring remain on the island to repeat its life cycle. In thecase of Krakatau, which is a volcanic island in Indonesia, we havemany recordings of its recolonization by life forms after the 1883eruption which wiped the island clean of all preceding life forms.One of the first groups of organisms to colonize was that ofspiders and insects.
11.What type of selection pressure would enhance the survival ofthe spiders and insects once they landed on the new KrakatauIsland? Why? (i.e. divergent, convergent)
12.What kind of selection pressure would prevent the successfulcolonization by insects and spiders? Why?
