Across
- 1. an animal or plant that lived many thousands of years ago and that has been preserved
- 3. invisible or indistinguishable without the use of a microscope
- 5. Gram-negative prokaryotic microorganisms that were originally referred to as the 'blue-green algae'
- 10. the movement of continents resulting from the motion of tectonic plates
- 12. originator of continental drift hypothesis
- 13. supercontinent named by Alfred wagner
- 14. cells that have specific structures and functions in the body
Down
- 2. bizarre fossils whose biological origins were debated until only a few decades ago
- 4. that is found in small quantities in the atmosphere
- 6. the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
- 7. he bottom of the ocean.
- 8. the long-term, predictable atmospheric conditions of a specific area
- 9. a seafloor mountain system formed by plate tectonics
- 11. an individual animal, plant, or single-celled life form.