Melting wax, evaporating gasoline, freezing water. These changes are examples of
A) nuclear changes.
B) physical changes.
C) chemical changes
D) energy consumption

List the advantages and disadavantages of the switch from persistent chlorinated hydrocarbon pesticides (such as ddt) to nonpersistent organophosphate pesicides. have the benefits of the switch outweighed the disadvantages? explain.

What is true of all organisms in the kingdoms protista, plantae, fungi, and animalia? a. they are multi-celled. b. they are photosynthetic. c. they have cells that contain membrane-bound organelles. d. they contain cells that lack membrane-bound organelles.

In the ocean why are the greatest amount of primary producers found in the epipelagic zone and how does that affect biodiversity