Independent assortment is what causes humans to be different from each other. Humans actually share remarkably similar DNA. But, to answer your question, GENOME VARIATION are differences in the sequence in DNA, that vary from person to person.
It may be c, if not you can punch me in the face.
Answer:
The answer is C. Their cells have nuclei.
Answer:
1- C, evolution.
2- D, adaptation.
3-A, gene. (if it is multiple choice, then its A and B.)
4-E, fitness.
Add-on:
sorry if its incorrect, hope this helped you.