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ACROSS
1)  a form of magnetic resonance imaging of the brain that registers blood flow to functioning areas of the brain
2)  the habitation of wild animals
3)  a singer whose voice lies in the ____ clef
4)  have the quality of being; (copula, used with an adjective or a predicate noun)


DOWN
1)  loose or flaccid body fat
2)  an animal that produces gametes (spermatozoa) that can fertilize fe____ gametes (ova)
3)  an established ceremony prescribed by a religion
4)  a heavy ductile magnetic metallic element; is silver-white in pure form but readily rusts; used in construction and tools and armament; plays a role in the transport of oxygen by the blood

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