Final Answer:
1. Darwin’s theory of evolution by natural selection explains that species change over time through inherited variations that affect survival and reproduction.
2. False — horses and donkeys are different species because their hybrid (mule) is sterile.
3. a. Variation
b. Adaptation
c. Natural selection
d. Adaptation
4. Darwin observed that finches on different Galápagos Islands had beaks suited to their specific food sources, suggesting they evolved from a common ancestor after reaching the islands.
5. Natural selection
6. a. Natural selection
b. Artificial selection
c. Natural selection
d. Natural selection
7. Natural selection acts on existing traits; it does not create new traits — new traits arise by mutation and other genetic changes first, then natural selection may favor them.
Parent Tip: Review the logic above to help your child master the concept of evolution worksheet high school.
