Which statement about proteins is true?
a.) collagen is a structural protein and hemoglobin is a protein involved in the transport of oxygen.
b.) glycogen is a structural protein and collagen is a protein involved in the transport of oxygen.
c.)glycogen is a structural protein and hemoglobin is a protein involved in the transport of oxygen.
d.)hemoglobin is a structural protein and collagen is a protein involved in the transport of oxygen.

Two people each hold the end of a rope and create waves by moving their arms up and down. this wave is best classified as a transverse wave because a) both the rope particles and the wave are moving in the same direction. b) the wave is moving up and down as the particles of the rope move horizontally. c) the wave is moving horizontally as the particles of the rope move up and down. eliminate d) the wave is moving in a parallel direction with the motion of the person's arms.