Afro-Asiatic, Dravidian, and Indo-European are examples of

Nostratic

Explanation:

The word “Nostratic” is used to describe a hypothesized proto-macrolanguage family that was spoken by people somewhere in Asia roughly fifteen thousand years ago. According to the theory, all Indo-European, Dravidian, Afro-Asiatic, Uralic, and Kartvelian languages derive from this one macrolanguage.

aug 15, 2012 - although van leeuwenhoek was not the inventor of the microscope, he advanced it more he loved to grind and focus a new lens in order to see the unseen world. most of leeuwenhoek's microscopes were silver. in a simple but significant experiment (1668), he demonstrated that worms found on