Natural Selection
Across
- 4. process by which groups of similar members of a species can no longer interbreed and produce fertile offspring
- 5. structural adaptation that enables one organism to resemble another
- 7. hypothesis that argues speciation happens in short rapid bursts of change in between long periods of genetic equilibrium
- 10. ____ selection selects "for" either extreme of a variation of a trait and against the intermediate forms
- 11. adaptation that enables anorganims to blend in with their surroundings
- 14. _____ selection selects "for" the average individual and against other variations of a trait
- 17. _______ structures of different species indicate a common evolutionary origin
- 18. pattern of evolution in which distantly related species evolve similar traits due to having similar environmental pressures
Down
- 1. _______structures are in present day organisms but no longer serve their original pupose
- 2. _______ generation is the idea that nonliving things can produce life
- 3. ____isolation is when formerly interbreeding organisms can no longer mate and produce fertile offspring
- 6. all of the alleles in the genes of a population
- 8. organisms best adapted to their environment tend to survive and transmit their genetic characteristics
- 9. breeding organisms with certain traits to get offspring with same traits
- 10. _____selection selects "for" one extreme of a variation of a trait
- 12. earliest stage of an organism's development
- 13. idea that living things come only from other organisms
- 15. _________ isolation is when a physical barrier prevents 2 groups of a population from interbreeding
- 16. ___ evolution is the pattern of evolution by which species that were once similar to an ancestral species become more different from each other