Answer:
The answer is D a retrovirus inserts DNA into the host cells genes
I think the scientist distinguish whether an entity is living or non living be describing the single unit of life, the live cell that could multiply, reproduce and generate trough time also through ages. I hope you are satisfied with my answer and feel free to ask for more
Sensation (A) is the term for the process of sensory organs detecting external stimuli and transmitting these stimuli to the brain.
Answer:
The first line of defense involves skin.