Metamorphosis and evolution. Again how much faith is involved to believe this.?

Question

Given this is true: Mutations slightly alter an organism’s genetic material which later generations inherit. On rare occasions the alterations are beneficial, enabling those offspring to reproduce more of themselves and the improved genetic material. After many generations, dramatic changes, even new organs, accumulate.
How then: What mutations could improve a larva? Certainly none that destroyed its nerves, muscles, eyes, brain, and most other organs, as occurs within a cocoon. So even if a larva improved, it later ends up as “mush.” From an evolutionary standpoint, liquefying complex organs is a giant step backwards.
Darwin: "If it could be demonstrated that any complex organ existed which could not possibly have been formed by numerous successive, slight modifications, my theory would absolutely break down."

Darwin quote = Charles Darwin, The Origin of Species, 6th edition (New York: Macmillan Publishing Co., 1927), p. 179

Answer 1

No mutations are involved in metamorphosis. At a certain time, genes activate and growth of structures occurs. Another case of preprogrammed growth is annual growth of deer antlers. When the gene actives, rapid growth occurs.

You are correct that beneficial mutations occur.

Answer 2

Name on time when mutation has been helpful? The fruitfly has four wings, yet it makes it harder for it to reproduce? When has mutation been helpful? Please, I'm interested....

Answer 3

you totally took that quote out of context