Most of animal-like protists are heterotrophs
Answer:
I believe it's d... or b
Explanation:
So I'm pretty confident that it's D seeing how it substitutes or deletes but it's only ONE gene...
Gene duplication played a critical role in evolution in that it produces redundant copies of existing genes, which are then free to mutate and adopt new functions. it is a major mechanism in which new genetic materials are generated during molecular evolution. Gene duplication is important in that it can provide new genetic material for mutation, drift and selection to act upon, which results in specialized or new gene functions.
The biggest challenge is rejection. Sometimes the human body will not accept the pig organ unfortunately.
Hope this helped. Good luck !