The removal of the predator populations from an ecosystem would most likely result in
(1) a decrease in all the prey populations
(2) an increase in all the producer populations
(3) an increase in ecosystem diversity
(4) a decrease in ecosystem diversity

How many atoms or molecules are there in a mole of a substance?

An uncovered pot of water lies out in the sun. which statements correctly describe what happens at the surface of the liquid water? 1. the vapor pressure remains constant regardless of the water temperature. 2. the vapor pressure is produced by water molecules that have evaporated. 3. the vapor pressure increases as the sun heats the water in the pot. 4. evaporation stops once the vapor pressure reaches a certain point. 5. evaporation and condensation both occur on the liquid’s surface.

In a covalent bond, two atoms are held together by the attraction between . the number of covalent bonds that an atom can form depends on the number of in the atom.