If a mutation has a visible effect at 26°C, but no visible effect at 20°C, then 20°C is the _______ temperature and 26°C is the _______ temperature.
A) permissive; conditional
B) permissive; restrictive
C) restrictive; conditional
D) restrictive; permissive
E) conditional; restrictive

Question

Quizplus · Accepted Answer

20°C is the permissive temperature because the organism can live normally despite the mutation. 26°C is the restrictive temperature because the mutation causes a visible effect, indicating the organism is under stress or unable to function normally at this temperature.

If a Mutation Has a Visible Effect at 26°C, but No