What are the four requirements for a valid experiment?

Awater molecule is polar because there is an uneven distribution of these between the oxygen and hydrogen atoms.

Explain how ancient whale fossils found in eqypt are believed to support the theory of evolution.

Which of the following is true of metabolism in its entirety in all organisms? a) metabolism depends on a constant supply of energy from food. b) metabolism uses all of an organism's resources. c) metabolism consists of all the energy transformation reactions in an organism. d) metabolism manages the increase of entropy in an organism.