Answer:
A gene is a basic physical and functional unit of heredity. Genes are present in the chromosomes of an organism. Genes carries the instructions to make molecules called as proteins which performs specialized function and building up the structure of living organisms. Genes are transferred from the parent organism to the offspring organism by the process of reproduction, hence maintains heredity in the living beings.
Answer:
An association between two organisms in which one benefits and the other derives neither benefit nor harm.
Explanation:
A promoter is located at the beginning
Answer:
I think it's A but thats just my best guess