| Rating | Solver | Clue |
|---|---|---|
| EVOLUTION | Gradual development | |
| EMBRYOLOGY | The science which relates to the formation and development of the embryo in animals and plants; a study of the gradual development of the ovum until it reaches the adult stage. | |
| GROWTH | The process of growing; the gradual increase of an animal or a vegetable body; the development from a seed, germ, or root, to full size or matu... | |
| DIFFERENTIATION | The gradual formation or production of organs or parts by a process of evolution or development, as when the seed develops the root and the ste... |