Evolution:
* Definition: The process by which living organisms have descended from ancient ancestors. It's a central unifying concept in biology.
* Key Points:
* Gradual: Evolution occurs slowly, over many generations.
* Cumulative: Changes accumulate over time, leading to significant differences between ancestral and descendant organisms.
* Based on Variation: Evolution relies on the existence of genetic variation within a population.
* Driven by Natural Selection: Natural selection favors traits that increase an organism's chance of survival and reproduction. These traits become more common in the population over time.
* Adaptation: As a result of natural selection, organisms become better suited to their environment. This is known as adaptation.
Evolve:
* Definition: To undergo evolution. This means to change genetically over time.
* Example: "The species evolved to have longer beaks for reaching nectar in flowers."
In summary: Evolution is the overarching process, and evolve is the verb describing the act of changing through that process.
Important Note: Evolution is not about a linear progression from "simpler" to "more complex" organisms. Instead, it's a branching process with many lineages evolving independently and adapting to different environments.
