These two scientists were credited for discovering microorganisms.
a. robert sheele and pierre bayen b. anton van leeuwenhoek and robert hooke c . hippocrates and syrus d. john jansen and theodore laennec

Which two factors caused many americans to migrate to the west in the mid-nineteenth century? pick two the texas revolution discovery of gold at sutter’s mill the mexican-american war an interest in american indian culture cheap land prices

Which is likely the most serious problem associated with an epidemic? 1. there are sometimes no cures to the diseases that spread. 2. people often die from the diseases that spread. 3. there are usually no ways to prevent people from getting ill. 4. people often don’t know they have a disease.

What does the document of the birtish octopus is an uderlying cause of the world war 1