Across
- 3. Preserved remains of, or traces of, ancient organisms
- 8. Assemblage of different populations that live together in a defined area
- 11. the change in heritable characteristics of biological populations over successive generations.
- 12. an organism which produces its own food through photosynthesis
- 13. any of several living arrangements between members of two different species, including mutualism, commensalism, and parasitism.
- 18. an organism that mostly consumes decaying biomass, such as meat or rotting plant material.
- 19. a relationship between individuals of two species in which one species obtains food or other benefits from the other without either harming or benefiting the latter.
- 20. the study of the development of the anatomy of an organism to its adult form, provides evidence for evolution as embryo formation in widely-divergent groups of organisms tends to be conserved.
- 22. a relationship between the two living species in which one organism is benefitted at the expense of the other.
- 25. Process by which organisms that are most suited to their environment survive and reproduce most successfully; also called survival of the fittest
- 27. an animal that feeds on flesh
- 28. Largest number of individuals of a particular species that a particular environment can support
- 29. a pattern of behavior in which animals travel from one habitat to another in search of food, better conditions, or reproductive needs.
Down
- 1. one specifies being the ancestor of two or more species in the later period.
- 2. Part of Earth in which lifre exists, including land, water, and air or atmosphere
- 4. The movement of genes into or out of a population
- 5. How well an organism can survive and reproduce in its environment
- 6. Study of past and present distribution of organisms
- 7. the similarity of one organism (the mimic) to another (the model) that enhances the mimic's fitness through its effect on the behavior of a third party, the operator
- 9. Change or adjustment in structure or habits by which a species becomes better able to function in its environment
- 10. Selective breeding of plants and animals to promote the occurrence of desirable traits in offspring
- 14. The selection of mates based on heritable traits
- 15. a defense or tactic that organisms use to disguise their appearance, usually to blend in with their surroundings.
- 16. an organism, especially a soil bacterium, fungus, or invertebrate, that decomposes organic material.
- 17. Organism that relies on other organisms for its energy and food supply; also called a heterotroph
- 21. the ecological interaction between two or more species where each species has a net benefit.
- 23. Group of ecosystems that share similar climates and typical organisms
- 24. an animal that feeds exclusively on plants.
- 26. All the organisms that live in a place, together with their nonliving enviornment
- 27. Competition is an interaction between organisms or species in which both require a resource that is in limited supply.