Crossword

4. theory that evolution occurs in rapid bursts of change followed by long periods of stability, rather than through slow, gradual changes over time.
7. rapid evolution of a species into different forms to fill various ecological niches.
12. extinct human species that lived about 1.9 million to 110,000 years ago.
13. A preserved remains of a organism
15. anatomical features that were once functional in an organism’s evolutionary ancestors but have lost or reduced their original function over time.
17. A basic units of heredity
18. features of a different species have similar functions but have a different anatomy
19. complete disappearance of a species from the Earth, typically due to environmental changes, loss of habitat, or inability to adapt to new conditions.
20. any movement of individual and the genetic material they carry from one population to another

1. new species form in the same geographic area due to factors like genetic changes or behavioral differences that prevent interbreeding.
2. The process where related species become more dissimilar over time due to different environmental pressures.
3. scientists use them to reconstruct complete structure of the organism
5. an organism at its early stages of development
6. theory that evolution occurs slowly and steadily over long periods of time through small, incremental changes in species.
8. scientific name for the human species
9. early human species that lived approximately 2.4 to 1.4 million years ago.
10. The process where unrelated species develop similar traits due to similar environmental pressures.
11. structures are similar physical features in organisms that share a common ancestor, but have a different functions
14. development of species
16. the process where two or more species influence each other's evolution due to close ecological interactions.