Answer: The Answers are, A: happens all the time, D: can be caused by genetic drift, and E: can be caused by natural selection.
Answer:
lactose, repressor, RNA polymerase (or mRNA might fit here), transcription, repressor, RNA polymerase
Explanation:
Hope this will help.
Answer:
Atoms combine when their electrons are shared or transferred
So if we eat a particular kind of food, and it has a particular kind of carbon in it, that's recorded in us, in our tissues, in our hair, in our fingernails, in the muscles