Across
- 2. carry dormant plant embryos packaged with a food supply and protected from drying out.
- 4. is an obtaining food.
- 7. is the study of past life
- 8. produce seeds in fruit
- 12. is short, irregular burst of speciation
- 13. discoveries began to reveal the history of life on earth
- 14. are nonvascular and seedless
- 16. proposed the first scientifically testable evolutionary theory
- 17. share many molecular features with plants
- 20. is the science of describing, naming, classifying species
Down
- 1. cause species to diverge
- 3. helps to define species
- 5. frequency vary between populations
- 6. are naked seed plants
- 9. is slow and steady speciation
- 10. marks the end of the line
- 11. proposed the species arise from a common ancestor and are changing
- 15. can lead to allopatric speciation
- 18. genetic change over time
- 19. similar but did not derive from common ancestor