Environmental bio
Across
- 1. features of different species that are similar in function but not necessarily in structure and which do not derive from a common ancestral feature
- 3. when species are reproductively isolated from others due to differences in behavior
- 4. the preserved remains of plants and animals whose bodies were buried in sediments, such as sand and mud, under ancient seas, lakes and rivers
- 7. among sexual organisms in which the differences in the timing of critical reproductive events
- 8. the process in which two or more populations of an ancestral species accumulate independent genetic changes
- 9. the changing of the structure of a gene, resulting in a variant form that may be transmitted to subsequent generations, caused by the alteration of single base units in DNA
- 12. features of an organism that are considered to have lost much or all of their original function through evolution
- 14. how a new kind of plant or animal species is created
- 15. a physical incompatibility between reproductive organs of 2 organisms
- 16. the process by which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth
- 17. an organism's ability to pass its genetic material to its offspring
- 18. similar physical features in organisms that share a common ancestor, but the features serve completely different functions
- 19. an evolutionary process in which humans consciously select for or against particular features in organisms
- 20. the separation of one Group of organisms from each other
Down
- 2. organisms best adjusted to their environment are the most successful in surviving and reproducing
- 5. the physical separation of populations of organisms from one another due to geographical barriers
- 6. variation in the relative frequency of different genotypes in a small population, owing to the chance disappearance of particular genes as individuals die or do not reproduce
- 10. the process through species adapt to their environment
- 11. a unit of heredity which is transferred from a parent to offspring and is held to determine some characteristic of the offspring
- 13. the complete disappearance of a species from earth
- 21. a change or the process of change by which an organism or species becomes better suited to its environment