About how much of earth is covered by clouds at any one time

How many structures do prokaryotic cells have in common with the eukaryotic cells? a. 2b. 3c. 4d. 5

Which country has the largest salt flats in the world

Which would be most likely to contain a good aquifer—igneous rock, sedimentary rock, or metamorphic rock? explain what qualities of this rock type make it a good aquifer. 500 word minimum response