How does a signal travel from one neuron to another? i don't know if its biology

1. variations in a population of moths allow for some of its members to be able to adapt to environmental changes. the better adapted of the moths will be able to survive the change and thus prevail as the “fittest” of the species. (a) describe three mechanisms in which variation can occur within a species population. (b) explain which mechanism or mechanisms would be responsible for the survival of a population of peppered moths better than white moths in an environment affected by industrial soot. justify your answer.

What would happen if the tubing with the yellow band was placed in a beaker of distilled water?

How far away is the nearest black hole from earth?