Which chemical secreted in the alveoli reduces surface tension?
a. oxyhemoglobin
b. pulmonary surfactant
c. carboxyhemoglobin
d. secretory IgA
e. mucus
B
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The coat characteristics of arctic foxes and Siamese cats, where proteins in the extremities function differently than in other parts of the body, is an example of _________
A. incomplete dominance B. multiple allele systems C. semilethal alleles D. temperature-sensitive allele E. None of the answers are correct
In a(n) ____ translocation, two nonhomologous chromosomes exchange parts and no genetic information is gained or lost from the cell in the exchange
a. cri du chat b. XXY c. copy number d. Robertsonian e. reciprocal
During your dissection of a fish, what structure would you have to remove to see the gills?
A. spiracle B. glottis C. operculum D. trachea E. jaw bone
The benefit provided by all hearts with two atria is
A. not all the blood has to pass through both sides of the heart. B. there is an extra place to store blood when the animal is at rest. C. that there are two muscular regions for pumping blood out of the heart to different organs. D. that blood is pumped into body tissues at high pressure. E. complete separation of oxygenated and deoxygenated blood.