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Hydrangeas

APBIO-CLGOXN

The color of the flowers on the hydrangea bush was blue last year, and now it is pink. The only change was a recent addition of lime to the soil surrounding the hydrangea bush.

Which of the following occurred within the hydrangea plant to cause it to produce a different color of flower?

A

There was a mutation in the gene that controls the color of the flowers. This mutation resulted in the change of the color of the flower on the hydrangea.

B

There was an increase in available water this year to the hydrangea plant which diluted the color of the flower from blue to pink.

C

The types of hormones produced by the hydrangea plant changed. This hormonal change caused the color of the flower to change from blue to pink.

D

The gene that codes for the color of the flowers can be affected by the pH of the soil. The change in pH changed the phenotype of the flower.