EVOLUTION
Across
- 5. organs that serve no useful function in an organism.
- 7. 1795 Theory of Geological change
- 9. theory of tendency toward Perfection.
- 11. struggle for members of each species have to compete for food, shelter, other life necessities.
- 13. were derived from common ancestors.
- 15. variation of differences among individuals of a species.
- 17. descent of each living organism has descended, with changes from other species over time.
- 18. smallest island, lowest islands were hot, dry, and nearly barren-Hood Island-sparse vegetation.
- 20. Principles of Geography
Down
- 1. structures that have different mature forms in different organisms.
- 2. survival of some individuals better suited for the environment.
- 3. a science born in the 20th century, reveals in detail how natural selection works.
- 4. layer show change Geographic Distribution of Living Things.
- 6. change over time.
- 8. selection of nature provides the variation among different organisms.
- 10. wrote an essay summarizing evolutionary change from his field work in Malaysia.
- 12. one of the fundamental keystones of modern biological theory.
- 14. collected the preserved remains of ancient organisms, called fossils.
- 16. remains of ancient organisms.
- 19. selection of results in changes in inherited characteristics of a population.