Most “new” immigrants to the united states in the late 1800s came fromcentral africa and southeast asia. central and south america. northern and western europe. southern and eastern europe.

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