Billy T said:
Both
The body is very adaptive, as getting tan at the beach (etc.) shows, but ony the mutation in the genes of the reproductive system's products is transmitted to the next generation.
That seems to run counter to the accepted scientific notion that evolution is "driven" (bad word, I know) solely by random mutations that are either beneficial, harmful or neither.
The fact that Evolution scientists claim that it is solely random mutations that are responsible for changes organisms is what causes trouble for a lot of people.
If it is not solely random, what causes the hair to grow faster and thicker in colder climates?
What causes the production of melatonin to be affected by sunlight exposure?
For example, how would the animal's physiology "know" to produce a thicker winter fur coat?
The animal can not consciously control the coat thickness, correct?
How does the body know to tan at the beach?
Evolutionary scientists will tell you the trait was a random mutation that was selected for.
Just like snake-headed moths, stick bugs, dead horse arums, leaf bugs, etc.
No intention, nothing driving it, simple random mutations.
Scientists tend to shriek when people start looking for the "why's" behind evolution. As I aid, I think it is because they are afraid people will answer, "God".
I don't think "God" is an answer, but I think there is certainly more to it than random mutations.