Across
- 6. the process of adapting to something
- 12. fossil record provides snapshots of the past which, when assembled, illustrate a panorama
- 13. an infectious agent that can only replicate within a host organism
- 14. one of two or more alternative forms of a gene that arise by mutation and are found at the same place on a chromosome.
- 15. the reciprocal evolutionary change in a set of interacting populations over time resulting from the interactions between those populations
- 17. the complete disappearance of a species from Earth
- 19. the main method of virus reproduction
- 20. a mechanism of evolution
Down
- 1. a viral reproductive stage where the virus's DNA is replicated using the host cell's DNA
- 2. affect which living things of the same kind survive long enough to produce young
- 3. When a male gamete and a female gamete are involved in reproduction
- 4. asexual reproduction by a separation of the body into two new bodies
- 5. features of an organism that are considered to have lost much or all of their original function through evolution
- 7. a mode of reproduction in which only one parent is involved to reproduce offspring
- 8. the study of the formation and development of an embryo and fetus
- 9. occurs when a group within a species separates from other members of its species and develops its own unique characteristics
- 10. the transfer of genetic material from one population to another
- 11. the change in frequency of an existing gene variant in the population due to random chance
- 16. the reduction in genomic variability that occurs when a small group of individuals becomes separated from a larger population
- 18. microscopic living organisms that have only one cell