Question

what is gradualism in evolutionary biology? mutations causing large changes in a species. sudden and rapid changes in a species. selection and variation that happens gradually over time. environmental changes leading to rapid evolution.

Explanation:

Gradualism in evolutionary biology is the concept that evolution occurs through small, incremental changes (selection and variation) over long periods. The orange option ("Selection and variation that happens gradually over time.") matches this definition. The other options describe rapid or large - scale changes, which do not align with gradualism.

Answer:

The orange option: Selection and variation that happens gradually over time.