Across
- 4. The process where distantly related organisms independently evolve similar traits to adapt to similar necessities.
- 6. The study of the formation and development of an embryo and fetus.
- 9. The loss of genetic variation that occurs after outside forces destroy most of a population.
- 10. A term that describes mechanisms of gene transfer from one population to another.
- 11. A microorganism that infects cells and may cause disease.
- 16. The reduction in genomic variability that occurs when a small group of individuals becomes separated from a larger population.
- 17. Asexual reproduction by a separation of the body into two new bodies.
- 18. The complete disappearance of a species from Earth.
- 19. Choosing parents with particular characteristics to breed together and produce offspring with more desirable characteristics.
- 22. The adjustment of organisms to their environment in order to improve their chances at survival in that environment.
Down
- 1. How a new kind of plant or animal species is created.
- 2. Organisms whose cells lack a nucleus and other organelles.
- 3. The process through which populations of living organisms adapt and change.
- 5. The change in the characteristics of a species over several generations and relies on the process of natural selection.
- 7. The process by which different organisms having common ancestors develop different traits or characteristics to adapt to the changing environmental conditions and needs
- 8. Evidence of bacteria, animals, and plants that lived in the past.
- 12. Cells containing membrane-bound organelles and are the basis for both unicellular and multicellular organisms.
- 13. Occurs when a virus has infected a cell, replicated new virus particles, and bursts through the cell membrane.
- 14. The change in frequency of an existing gene variant in the population due to random chance.
- 15. The process by which individuals compete for access to mates and fertilization opportunities
- 20. A large group of single-cell microorganisms.
- 21. A branch of science that is related to the formation, growth, and development of embryo.