Which of the following statements provides the best evidence that environment can play a role in determining the phenotype of an organism?
A) A primrose develops white flowers when grown above 32C, and red flowers when grown at 24C
B) The more genes involved, the more continuous is the variation in phenotypes.
C) True breeding red and white flowered four o'clocks produce pink flowered offspring at any temperature.
D) A curly haired caucasian and a straight haired caucasian will have wavy haired offspring, regardless of the time of year.
Answer: A) A primrose develops white flowers when grown above 32C, and red flowers when grown at 24C