Which animal population do scientists frequently study in order to identify specific ways to evaluate the impacts of contaminants on biological communities? a. bottlenose dolphins

b. giant tortoises

c. mallard ducks

d. swan geese

Which statement about relative potential energy of electrons is correct? a. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 2 s orbital of the second electron shell. b. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 3 p orbital of the third electron shell. c. an electron in the 3 p orbital of the third electron shell has more potential energy than an electron in the 2 p orbital of the second electron shell.