What amount of body fat is normal and healthy for a 19-year-old woman?
A) 3%
B) 8%
C) 10%
D) 20%.
Answer: D) 20%.
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In all organisms, active transport across a membrane requires
A) equal concentrations of ions on both sides of the membrane. B) a resting potential of 0 mV. C) exergonic movement indicated by the direction of the electrochemical potential. D) an asymmetric distribution of ions across a membrane. E) both choices B and D
The process seen in many insects involving the pupa completely changing form into an adult is called
a. cephalization. b. coelom formation. c. skeletonization. d. molting. e. metamorphosis.
the main substrates for gluconeogenesis are the three carbon long molecules of alanine, glycerol, and _________
Fill in the blank(s) with the appropriate word(s).
Which class is made up of members commonly called chitons?
a. Cephalopoda b. Scaphopoda c. Polyplacophora d. Gastropoda