Although chickens, chimpanzees, cows, and humans share a gene for insulin, two species are more closely related to one another than the others. Select the correct pair of species. (10 points) A. chickens and cows
B. chimpanzees and cows
C. chickens and humans
D. chimpanzees and humans

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explanation:

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

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on island x the species needed to adapt because they were being subject to predators which didn't inhabit island y.  

the law of original horizontality explains:   why rocks appear in layers. correct answer: b the law suggests that all rock layers are originally laid down (deposited) horizontally and can later be deformed.   the principle is used by geologists to make assumptions about the relative ages of sedimentary rocks.