I would have to say skin or hair
No. It was an idea that yielded common positive results. “Not a good theory” is biased terminology. New technology can yield new information, but it does not mean that it was not a good theory.
...carbon dioxide levels will Increase
.... temperatures will Increase
Answer:
Mutation is the source for new genetic variation: Genetic variation is brought about by random mutation. Without mutation, genetic variation cannot occur. Mutation is a change in the genetic code in DNA and can lead to a change in the protein that is coded for that segment of DNA.
Explanation:
Mutations are changes to an organism's DNA and are an important driver of diversity in populations. Species evolve because of the accumulation of mutations that occur over time. ... This mutation has introduce a new allele into the population that increases genetic variation and may be passed on to the next generation.