The horizontal rows<span> in the </span>periodic table<span> are periods, while the vertical </span>rows<span> are </span>called<span> groups. </span>
The answer is United States
Answer:
Gene mutation
Explanation:
The difference in the coloration of the whale is due to mutation. Mutation is an alteration of the gene of an organism which can result in a change in phenotypic qualities. Mutation can be caused by exposure to mutagens such as industrial chemicals.
