Across
- 2. an inherited behavior that helps an organism survive
- 3. inherited characteristic that increases an organism's chance of survival
- 4. The top rock layer and its fossils is the youngest and the bottom is the oldest.
- 9. a physical or chemical event that occurs within the body of an organism and enables survival
- 10. group or level of organization into which organisms are classified
- 11. Ability of an animal to look like another more harmful animal
- 14. a random error in gene replication that leads to a change
- 17. A classification grouping that consists of a number of similar, closely related species
- 18. Bodies within the nucleus made in DNA and proteins called the histones
- 20. An organism in the earliest stage of development
- 24. Organisms with the best traits pass on their genes. Resulting in adaptations overtime.
- 25. A preserved remnant or impression of an organism that lived in the past.
- 26. a natural process resulting in the evolution of organisms best adapted to the environment.
- 30. Process by which cells from two different parents unite to produce the first cell of a new organism.
- 33. a physical feature of an organism's body having a specific function that contributes to the survival of the organism
- 34. when some species are no longer effected by interventions such as antibiotics or pesticides
- 35. A reproductive process that involves only one parent and produces offspring that are identical to the parent.
- 36. A structure that is present in an organism but no longer serves its original purpose
- 37. Combined genetic information of all the members of a particular population
- 39. the formation of new and distinct species in the course of evolution.
Down
- 1. Body parts that share a common function, but not structure
- 5. The gradual change in a species over time
- 6. Structures in different species that are similar because of common ancestry
- 7. A group of organisms that are closely related and can mate to produce fertile offspring
- 8. A species that is most suited to survive in a certain type of environment.
- 12. Any color, pattern, shape, or behavior that enables an animal to blend in with its surroundings
- 13. the evolution of populations of pathogenic bacteria that antibiotics are unable to kill
- 15. Fossils that provide patterns of evolutionary change from the early ancestors to modern life forms.
- 16. Process by which two species evolve in response to changes in each other
- 19. A characteristic that an organism can pass on to its offspring through its genes.
- 21. using DNA sequences and/or chemical compounds of species to determine relatedness
- 22. Barriers Natural features that make travel, trade, communication more difficult.
- 23. Human interventions in helping to produce desired traits in domesticated animals
- 27. Classification system in which each species is assigned a two-part scientific name
- 28. Any difference between individuals of the same species.
- 29. A form of asexual reproduction in which a new cell grows out of the body of a parent.
- 31. A term that typically describes a species that no longer has any known living individuals.
- 32. the state of existing before or previous to something else
- 38. the study of embryos and their development.