If the goal is to observe soft tissue structures with a typical size of 1 mm, what frequency of ultrasound is required

the darker peppered moth species were favored due to the fact that the industrial revolution had made all the nearby trees a darker color instead of white.

i believe the answer would be b. hope it : )

it's diluted or concentrated

in a diluted solution, you can add a lot more solute but in concentrated only a little more can be added