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Across 2. width is a phrase relating to ecology defining the actual space that an organism inhabits and the resources it can access as a result of limiting pressures from other species (e.g. superior competitors). 5. is the process through which new species evolve from a single ancestral species while inhabiting the same geographic region. 8. A random difference in allele frequencies of a population founded by a small group of organisms relative to the allele frequencies in the original population 14. different species may live in the same area, but properties of individuals prevent them from interbreeding. 15. something extrinsic to the organisms prevents two or more groups from mating with each other regularly, eventually causing that lineage to speciate. 16. the rearrangement of genetic material, especially by crossing over in chromosomes or by the artificial joining of segments of DNA from different organisms.

Down 1. A GMO is an organism whose genome has been altered by the techniques of genetic engineering so that its DNA contains one or more genes not normally found there. 3. the deliberate modification of the characteristics of an organism by manipulating its genetic material 4. Drastic short-term reductions in population size caused by natural disasters, disease, or predators; can lead to random changes in the population's gene pool 6. variation in the relative frequency of different genotypes in a small population, owing to the chance disappearance of particular genes as individuals die or do not reproduce. 7. 1.The definition of geographic isolation is a group of plants, animals or other living creatures being separated from mixing genes within their same species 9. An organism free of interference from other species could use the full range of conditions (biotic and abiotic) and resources in which it could survive and reproduce 10. a species that is specialized to live in aspecific habitat or to feed on a small group of species. 11. a species that can live under a wide range of abiotic or biotic conditions. 12. The evolutionary development and history of a species or higher taxonomic grouping of organisms. 13. •the way in which something is shared out among a group or spread over an area.