Which organ is responsible for the synthesis of ketones from fatty acids?
A. stomach
B. brain
C. liver
D. heart
E. kidney
Answer: C
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Where is the trachea in reference to the esophagus in humans?
a. dorsal, or behind b. superior, toward the head c. ventral, or in front d. inferior, toward the feet
Which of the following layers of the digestive tract is the only one that has direct contact with food
before it is digested? a. serosa b. longitudinal muscle c. mucosa d. submucosa e. circular muscle
Two bird species have different mating calls, occupy different habitats in nature, and when they hybridize, the hybrids are infertile. Which isolating mechanisms maintain these species?
A. geographical isolation, temporal isolation, behavioral isolation B. mechanical isolation, hybrid sterility, geographical isolation C. ecological isolation, mechanical isolation, hybrid sterility D. ecological isolation, behavioral isolation, and hybrid sterility
Blood smears are used in diagnosis ofÂ
A. African sleeping sickness. B. toxoplasmosis. C. malaria. D. African sleeping sickness and malaria. E. toxoplasmosis and malaria.