Answer:
The mouse disappears and bars seen only instead of the disappearing of the cage as the image falls on a blind spot in this blind spot test by looking X with one eye in the lower panel. It happens due to optical illusion where the brain compensates with missing information on its own and completes the cage as the brain fills the missing data in a regular pattern. Thus, the mouse disappears from the cage, and only bars are seen.
The brain has the ability to complete the missing part of the image as the visual field of the two eyes overlap therefore with open eyes there is no blind spot precieved.
Infectious diseases are caused by microorganisms such as viruses, bacteria, fungi or parasites and can spread between individuals.
She traveled to Crimea in 1854
It varies from person to person but can be anywhere from 640-850