During fetal development the primary site(s) of red blood cell production is/are
A) bone marrow.
B) liver.
C) thymus.
D) kidneys.
E) liver and spleen.
Question 2
In resting individuals, energy use is proportional to
A) amount of lipids in the diet.
B) carbon dioxide produced during cellular respiration.
C) total caloric intake.
D) weight.
E) oxygen consumption.