Answer:
Mutation rate is not a difference between a population showing exponential growth and a population showing logistic growth. Hope this helped :D
Isotonic since in a hypertonic solution the cell would shrivel up and in a hypotonic solution it would lyse (burst).
A peplomer is a glycoprotein spike on a viral capsid or viral envelope. These protrusions will only bind to certain receptors on the host cell; they are essential for both host specificity and viral infectivity.