Red blood cells are capable of transporting
A. carbon dioxide only.
B. nutrients.
C. oxygen and carbon dioxide.
D. oxygen only.
Answer: C
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Which event occurs in the lungs?
a. Free H+ binds to hemoglobin. b. Plasma HCO3? enters erythrocytes.
c. CO2 and H2O are converted into HCO3? and H+ in the plasma. d. Carbonic anhydrase converts CO2 and H2O into HCO3? and H+ in erythrocytes. e. CO2 binds to hemoglobin.
What makes "golden rice" golden?
What will be an ideal response?
Which one of the following best describes the evolutionary advantage of bipedalism?
A) allows an organism to have precise control over the action of the thumb and fingers B) frees the hands for carrying objects C) results in improved eye-hand coordination D) in early humans, allowed for complex motions associated with the use of tools E) increases the chance that an organism can communicate through the written word
Dinoflagellates __________.
a. possess two flagella b. are all autotrophic c. lack mitochondria d. are all heterotrophic e. are all marine