Evolution

3. / had different shaped beaks depending on the island they were from
5. / study of the earth
7. Beagle / the name of the ship that Charles Darwin traveled on
10. / required for new species to form
11. / refers to the variety of living things
12. / when two species evolve together
13. / a characteristic that helps an organism survive
14. / the formation of new and distinct species in the course of evolution
15. / type of evolution when the same adaptations evolve independently, under similar selection pressures
17. / Darwin collected the preserved remains of ancient organisms, called ______
18. radiation / when a species splits into a number of new forms when a change in the environment makes new resources available or creates new environmental challenges.
19. selection / Charles Darwin’s theory of evolution states that evolution happens by what?

1. / the name of Darwin's book; the _____ of species
2. / organs that serve no useful function in an organism
4. / a well-supported testable explanation of phenomena that have occurred in the natural world
6. / structures that are similar
8. / principle that states that living species are descended from ancient ones; descended with ____________
9. / when organisms disappear from the earth
15. Darwin / father of evolution
16. / is the process by which modern organisms have descended from ancient organisms