Answer:
The cornea is the only part of a human body that has no blood supply; it gets oxygen directly through the air.
Explanation:
The correct answer to the question about why can a Benedict solution be used to distinguish between a glucose and a sucrose is letter A. Benedict's Solution is used to test the presence of reducing sugar. Glucose is a reducing sugar while Sucrose is a non-reducing sugar since it has a glycosidic bonds between their structure that hinders the formation of open chain. In the end, Sucrose stuck at its cyclic form.
The story between the two pairs of scientists, Watson and Crick, who discovered just one of "the most important molecule in the history" is a series of ups and downs. They are an unlikely pair and they had difficulty in unraveling the molecule because neither are that much knowledgeable on structural chemistry.
