Which statement below best describes mutations?

a. all mutations cause organisms hardship.
b. mutations always good for an organism and the species as a whole.
c. mutations are a change in dna or a chromosome and can be , harmful or may have no affect.
d. mutations occur when the dna is made with out error and the nucleotide bases match up exactly as intended.

C. Mutations are a change in DNA or a chromosome and can be helpful, harmful or may have no affect.

Explanation:

answer; ///(d) the correct answer is double or triple

pure water does not conduct electricity very well. however, when certain substances are dissolved in water, the solution does conduct electricity. you can make a simple device that shows how well a solution conducts electricity. this device uses a flashlight bulb to indicate how well the solution conducts electricity. the better the solution conducts electricity, the brighter the bulb will glow.

explanation: