The answer is C<span>. 3,2,1,</span>
C. Meters are the SI unit for length so would be most meaningful.
In negative control, a gene is switched off when a regulatory protein binds to DNA and shuts down transcription.
They are in response to the environment. Both are homoeostatic mechanisms that lower the core temperature of the body in response to an increase in body temperature. This is an example of 'negative feedback'.
