Differences between natural key and a surrogate key

If jane has the blood type ab and marries john who has type o blood what are the possible phenotypes of their first kid?

9. the history of life on earth is recorded in

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.