What is a gene?
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a. a piece of dna that controls a trait
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b. a specific form of an allele
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c. a group of chromosomes
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d. a chromosome that determines gender

If the dimensions of a cube-shaped cell with a length,height, and width of 1 micrometer were to double, what would be the cell's new ratio of surface area to volume? a.3 to 1 b.4 to 3 c.1 to 2 d1 to 6