The changes in species that have been seen over time required
Energy exercise strong microscopes mutations gene splicing warm weather vegetation Energy.
A B C D E F G H
Evolution causes species to change over time.
Mutations are required for species to change over time
The changes in species that have been seen over time required (A) Energy (B) exercise (C) strong microscopes (D) mutations (E) gene splicing (F) warm weather (G) vegetation (H) Energy.