In Plants,the Average Expression of Genes Involved in Cold Tolerance

Question

In plants,the average expression of genes involved in cold tolerance is _________.  
A) highest just before daytime hours
B) lowest just before nighttime hours
C) highest just before nighttime hours
D) constant during nighttime and daytime hours
E) the constant during nighttime hours

Accepted Answer

Plants generally experience colder temperatures during nighttime, so it makes sense for the genes involved in cold tolerance to be expressed at their highest levels just before nighttime hours to prepare the plant for the upcoming colder period.