Activational effect is the correct answer.
Activational effect is an impermanent hormonal effect that leads to a change in physiological activity or behavior in both humans and adult animals. For instance, when testosterone levels rise in male songbirds they become more aggressive and tend to engage in courtship behavior. Also, a pregnant woman may get more emotional than usual due to an extra level of progesterone and estrogen during pregnancy.
I think
Prometer---> Spot where transcription begins
Operator ---> On/Off switch
Terminator ---> Spot where transcription ends
The answer is C. hope this helps
Need the descriptions in order to answer the question.
Answer:
an advantage is living cells can be examined in their natural state without previously being killed, fixed, and stained
