Answer:
a. repressor
b. regulator
c. operator
Explanation:
All constituent genes of an operon are transcribed in a coordinated manner, such as polycistronic mRNA, that is, multigenic, which is sequentially translated into proteins by ribosomes. The initiation of transcription can be regulated positively or negatively. The genes under negative control are constantly expressed unless they are "disconnected" by a repressor protein that will prevent gene expression by binding to a specific DNA sequence called operator, preventing RNA polymerase from initiating transcription in the promoter.
Those genes whose expression is under positive control will not be transcribed unless an activating protein is present which binds to a specific DNA sequence and helps RNA polymerase in the initial steps of transcription.
Oxygen, water vapor, and glucose
This is true. Not only are they interdependent, but they also interact all the time. This might not always be visible, but it does happen over time.
Genetic mutations are passed on because when the DNA is mutated, it stays that way. Therefor the mutated DNA would continue to be passed on because the same DNA is passed on to the offspring during meiosis, which produces gametes (eggs and sperm) mutations and all!
The best answer is A) greater variety of food sources