not all mutations cause visible change
The correct answers are A) The elevations of contour lines must always be whole numer multiples of the contour interval. and C) Points inside a contour line are a higher elevation than the contour line. Hope this helps
<span> the answer is an antigen</span>
The relationship mutualism in biology means that the two organisms which are of different species exist in a relationship in which the individuals benefit from the activity of the other. From the choices, letter B. Bees pollinating flowers.