| A | B |
|---|
| Adaptation | The adjustment of an organism to its environment |
| Environment | The surroundings of a plant or animal |
| Choice Chamber | Equipment that tests how animals react to the environment |
| Survival of the Fittest | Organisms that are better adapted to a certain environment are more likely to survive than others |
| Evolution | Changes in a species that happen over a long period of time |
| Selective Breeding | Where humans choose certain useful features and breed organisms with them |
| Variation | The difference between things |
| Homozygous | When an organism has two identical alleles |
| Allele | Different versions of the same gene |
| Dominant Allele | An allele that stops another allele from working |
| Recessive Allele | An allele that is stopped working by a dominant allele |
| Heterozygous | When an organism has one dominant and one recessive allele |
