Waagen's law of mutation, or the appearance of new parts or organs so gradually that they can be perceived only by following them through successive geologic time stages, appears to be directly contradictory to the saltation principle; it is certainly one of the most firmly established principles of
geologic time הגייה עם משמעויות, מילים נרדפות, הפכים, תרגומים, משפטים ועוד