Which of the following statements is false?
A. The walls of the right ventricle are thicker
than the walls of the left ventricle.
B. Blood pressure in the pulmonary
circulation is lower than blood pressure in the
systemic circulation.
C. The left ventricle pumps oxygenated
blood, whereas the right ventricle pumps
deoxygenated blood.
D. The systemic blood pressure of a bird is
much higher than that of a fish.
E. None of the answer options is false.
A
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Bacteriochlorophyll differs from chlorophyll a and b in structure and function. Which of the following statements correctly contrasts these types of chlorophyll?
A) Bacteriochlorophyll has a porphyrin ring, whereas chlorophyll does not. B) Chlorophyll has a phytol side chain, but bacteriochlorophyll does not. C) Chlorophyll has a methyl group attached to the porphyrin ring, whereas bacteriochlorophyll has a formyl group. D) Bacteriochlorophyll has a saturated carbon-carbon bond at one location in the porphyrin ring, whereas chlorophyll does not. E) both choices A and D correctly contrast these types of chlorophyll.
____ must have been the first eukaryotic cells
a. Archaea b. Bacteria c. Protists d. Fungi e. Microplants
Health workers working with diphtheria commonly receive a serum with antibodies against the pathogen. What type of immunity would this be?
a. active, natural immunity b. passive artificial immunity c. active, artificial immunity d. passive, natural immunity
An organic molecule always contains one or more atoms of _____.
A) sulfur B) carbon C) oxygen D) nitrogen