If Peach Trees Growing in Specific Mild Climates of the Southern

Multiple Choice

If peach trees growing in specific mild climates of the southern United States do not receive about 850 hours of temperatures below 40 degrees, they will not produce flowers in the spring.This effect is explained by which of the following terms?

A) photoperiodism
B) phototropism
C) senescence
D) vernalization
E) dormancy