Figure 23.3 -According to the Theory of Seafloor Spreading,oceanic Islands,such as the as the Hawaiian

question 57

Multiple Choice

Figure 23.3
-According to the theory of seafloor spreading,oceanic islands,such as the Hawaiian Islands depicted in Figure 23.3,form as oceanic crustal plates move over a stationary "hot spot" in the mantle.Currently,the big island of Hawaii is thought to be over a hot spot,which is why it is the only one of the seven islands that has active volcanoes.What should be true of the island of Hawaii?
1) Scientists in search of ongoing speciation events are more likely to find them there than on the other six islands.
2) Its species should be more closely related to those of nearer islands than to those of farther islands.
3) It should have a rich fossil record of terrestrial organisms.
4) There is a good chance of finding endemic species on this island.
5) On average,it should have fewer species per unit surface area than the other six islands.

• A)1,2,and 3
• B)1,2,and 5
• C)1,2,3,and 4
• D)1,2,4,and 5

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