True of false? Scientists estimate that one thimble of soil could hold more than 20,000 microorganisms.

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation:

the awnser is group 12

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.