Across
- 2. A random change in a gene that results in a different trait
- 4. the reproductive organs do not match up
- 6. barriers that take effect before fertilization
- 9. heterozygous
- 11. differences in mating habits that prevent species from intermixing
- 12. different structures that have similar functions.
- 13. random event that severely decreases the population and leaves random survivors
- 15. Similar structure, different function
- 17. a diagram that depicts the lines of evolutionary descent of different species, organisms, or genes from a common ancestor.
- 18. homozygous recessive
- 21. barriers that take effect after fertilization.
- 22. no mutation, random mating, no gene flow, infinite population size, and no selection.
- 23. species mating at different times
Down
- 1. ________happens because more babies are born than there are resources to support them
- 3. the maximum population size an ecosystem can support sustainably
- 5. infertile offspring is produced
- 7. Gametes cannot form a zygote
- 8. ____evolve, not individuals
- 10. zygote does not live to maturation
- 14. distantly related species, independently evolving similar traits due to similar environments or environmental pressures.
- 16. Naturalist who worked with tortoises in the Galapagos
- 19. a role an organism plays in a community
- 20. survival of the...
- 24. homozygous dominant