Across
- 2. a group of similar organisms capable of reproducing fertile offspring
- 5. differences in organisms
- 6. organisms of the same species living together
- 8. measures how frequent an allele of a gene is expressed in a population
- 9. courtship and mating behavior causing isolation in species
- 10. physial barrirers dividing a population
- 11. change in genetic composition of a population over many generations
- 13. total number of genes of all organisms in a population
- 14. new species forming as a result of evolution
Down
- 1. members of separate populations cannot make successfully
- 3. organisms well adapted to their environment survive and reproduce more offsping
- 4. timing of reproductive periods can prevent mating
- 7. characteristics that increase an organism's chances of survival
- 9. study of geographical distribution of plant and animals
- 12. implies reproductive success