Final answer:
A developmental groove, such as the neural groove, is an elongated depression that can develop into structures like the central nervous system. Pits are small depressions or holes that may serve as attachment points or openings into canals, and are more localized than grooves.
Step-by-step explanation:
The difference between a developmental groove and a pit lies in their structure and formation during the development of an organism. A developmental groove, such as the neural groove that forms during the early embryonic development of the nervous system, is an elongated depression where the sides fold inwards. It serves as a precursor to the neural tube, which eventually develops into the central nervous system.
On the other hand, a pit is typically a small depression or hole that can form in various contexts within biology, from the surfaces of teeth to passages in bone. Pits may serve as points of attachment, openings into canals, or act as air-filled spaces in bones. They are more localized than grooves and do not form elongated basins.