Answer:
Erect.
Explanation:
Paranasal sinuses are the group of air filled sacs that are present around the nasal cavity. Paranasal sinuses are present four in numbers. These are maxillary sinuses, frontal sinuses, ethmoidal sinuses and sphenoidal sinuses.
The radiography of paranasal sinuses using X ray technique is helful in medical diagnosing. The erect position provides the best image for the radiography of paranasal sinuses.
Thus, the correct answer is option (A).
If this is true, than the animal that is embedded in this fossil most likely would have had opposable thumbs, which are crucial for using tools and climbing trees.
The law of conservation of energy is a law of science that states that energy cannot be created or destroyed, but only changed from one form into another or transferred from one object to another. Hope it helps
