What are two differences between a warm front and a cold front?

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

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.

Cells must be in osmotic equilibrium with their surroundings environments because if they swell or shrink thier membranes will rupture