Across
- 3. change over time
- 5. type of diagram that shows the relationship of organisms to their ancestors as well as common ancestry
- 7. the ability of an organism to survive and reproduce in its environment
- 9. scientists that study fossils
- 12. stated that all species of organisms arise and develop through the natural selection of small, inherited variations that increase the individual's ability to compete, survive, and reproduce
- 13. a well-supported testable explanation of phenomena
- 14. substances which cause an immune response
- 17. there are basic similarties in the body structures of closely related organisms
- 20. is expensive and destorys part of the fossil in the process
- 21. produce antibodies
- 22. the random appearance of a new trait in an organism
- 23. that develop from the same embryonic tissues
- 24. chemical that interferes with the ability to viruses to attack ther body cells
- 25. life comes from life
- 26. attack viruses, fungi, cancer, some bacteria, etc.
- 27. enter body cells, hijack their organelles, and turn the cell into a
Down
- 1. the formation of a new species
- 2. when organisms try to get their fair share of a limited amount of resources
- 4. the process whereby organisms better adapted to their environment tend to survive and produce more offspring
- 6. a set of organisms is the most recent individual from which all the organisms of the set are descended
- 8. a group of genetically similar organisms that can mate and produce fertile offspring
- 10. a group of the same organism that occupies a specific area in a specific time
- 11. diversity in gene frequencies
- 15. a chain of islands off the western coast of South America each having very different climates
- 16. something that can be inherited through genetic characteristics
- 18. any inherited characteristic that increases an organism's chances of survival
- 19. once engulfed, the phagocyte breaks the foreign particles apart in organelles
- 20. life comes from non-living things