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IMSO 2007 Taiwan Selection — Science First Round Question 15

IMSO Science · IMSO 2007 Taiwan Selection — Science First Round

Question 15

In one variety of corn, the kernels turn red when exposed to sunlight. In the absence of sunlight, the kernels remain yellow. Based on this information, it can be concluded that the color of these corn kernels is due to the
  1. process of selective breeding
  2. rate of photosynthesis
  3. effect of environment on gene expression
  4. composition of the soil