| A | B |
|---|
| trait | A characteristic that makes one organism different from another. |
| heredity | The process by which traits are passed from parents to offspring. |
| gene | The basic unit of heredity. |
| life cycle | All the stages a living thing goes through. |
| direct development | A kind of growth in which an organism gets larger but doesn't go through other changes. |
| metamorphosis | Major changes in the body form of an animal during its life cycle. |
