Which of the following is not true regarding sickle-cell disease?
A) It is due to a hereditary hemoglobin defect.
B) It is advantageous in that it can protect carriers against malaria.
C) It is caused by a recessive allele that modifies the structure of hemoglobin.
D) It is a cause of malaria.
E) It is a cause of anemia.
D
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Dalton's law states that
A) gas volume and temperature are directly proportional. B) gas volume and pressure are inversely proportional. C) the volume of gas that will dissolve in a solvent is proportional to the solubility of the gas and the gas pressure. D) in a mixture of gases such as air, the total pressure is the sum of the individual partial pressures of the gases in the mixture. E) gas pressure is inversely proportional to gas volume.
__________ is interruption of breathing resulting in lack of oxygen
Fill in the blank(s) with correct word
Receptors
a. generate action potentials in afferent fibers in response to stimuli. b. change other forms of energy into electrical energy. c. are located in the dorsal root ganglion. d. both (a) and (b) above. e. all of these answers.
Which statement is true regarding how the cow eye differs from the human eye?
A) The cow's eye reflects light rather than absorbing it. B) The cow's eye lacks cone photoreceptors. C) The cow's eye is more oblong in shape. D) The cow's eye has four tunics rather than three.