Natural selection
Across
- 5. A series of actions or steps taken to achieve an end.
- 8. Change in a kind of organism over time; process by which modern organisms have descended from ancient organisms.
- 11. the surroundings or conditions in which a person, animal, or plant lives or operates.
- 12. selection Selection by humans for breeding of desirable traits from the natural variation among different organisms
- 14. to stay alive.
- 15. selection A natural process resulting in the evolution of organisms best adapted to the environment.
- 16. Ability of an organism to survive and reproduce in its environment.
- 17. differences in physical traits of an individual from the group to which it belongs.
- 18. A characteristic that improves an individual's ability to survive and reproduce in a particular environment.
Down
- 1. Being of use; helpful; favorable.
- 2. bird's mouth.
- 3. being the only one of its kind.
- 4. a person that someone is descended from.
- 6. Product of reproduction, a new organism produced by one or more parents.
- 7. group of individuals of the same species that live in the same area.
- 9. A group of organisms that are closely related and can mate to produce fertile offspring.
- 10. a person considered as descended from some ancestor or race.
- 13. A characteristic that an organism can pass on to its offspring through its genes.
- 16. advantageous.