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Across 4. all members of a specific species occupying a particular area at the same time 7. uses reverse transcription from rna into dna 8. single nucleotide polymorphism 10. when the provirus is activated 13. virus that causes hemorrhagic fever 15. developmental regulatory genes 18. naked strands of rna that cause diseases in plants 20. proposes speciation occurs after populations become isolated 21. scientific name for horse 25. bacteriophages carry portions of bacterial dna from a donor cell to a recipient 29. isolated from extremely hot hot and acidic environments such as geysers, and hot springs. 30. father of evolution

Down 1. additional set of chromosomes beyond diploid number 2. effect that prevents the majority of genotypes from participating in the production of the next generation 3. used as vectors to carry foreign dna into host bacteria 5. cycle in which viral reproduction occurs 6. produced when the plasma membrane surrounds polymers, 9. geological changes occur at a uniform rate 11. composed of protein and surrounded by envelope 12. reproduce asexually by means of binary fission 14. where species live and how they interact with one another 16. any allele frequency change within a gene pool of a population 17. study of the distribution of plants and animals around the world 19. raw material for evolutionary change 22. seperation that requires a geographic barrier 23. cycle in which viral reproduction does not immediately occur 24. prevents hybrid offspring from developing 26. most bacteria are 27. the splitting of one species into 2 or more species 28. also called gene migration