Across
- 3. a measure of the relative contribution that an individual trait makes to the next generation.
- 7. explanation of a natural phenomenon based on many observations and investigations over time.
- 8. when populations produce more offspring than can survive.
- 9. Darwin’s term for the selective breeding of organisms selected for certain traits in order to produce offspring having those traits.
- 10. visited the Galapagos on the beagle and developed the theory of evolution by natural selection.
- 11. inherited characteristics of a species that develops over time in response to an environmental factor, enabling the species to survive
- 12. theory of evolution developed by Darwin, based on four ideas: excess reproduction, variation, inheritance, and the advantages of specific traits in an environment.
Down
- 1. directed breeding to produce plants and animals with desired traits
- 2. variations are inherited from parents.
- 4. some variations allow the organism that possesses them to have more offspring that the organism that does not possess them.
- 5. cumulative changes in groups of organisms through time.
- 6. individuals in a population differ from one another.