57. The inner mitochondrial membrane contains numerous inward folds called cristae, which greatly increase the surface area of this membrane. Because ATP is produced on the inner mitochondrial membrane, cristae enhance the ability of the mitochondria to generate ATP. What structure can be thought of as similar to these cristae? (A) Spiracle (B) Finger-like projections of a human's small intestine (C) Bronchiole (D) Cartilage

59. Teeth aren't exactly bones, but they're made up of similar tissues and are subject to the same problems bones may have. In what way(s) do you predict the disease rickets might affect teeth? (A) Periodontal disease: Redness and swelling elicited by bacterial infection of the gums. (B) Delayed formation: The baby teeth may not erupt until after one year. When they erupt, they may be smaller than normal. (C) Increased likelihood of cavities: Low vitamin C status prevents sufficient mineralization, allowing infection to establish on the teeth. (D) Canker sores: Painful mouth sores associated with bacteria and/or viruses.

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