In humans, blood cells are produced in the
a. bone marrow.
b. heart.
c. kidneys.
d. liver.
e. lymph nodes.
A
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Tear ducts pass between which two bones?
a. maxilla and sphenoid b. sphenoid and ethmoid c. nasal and lacrimal d. lacrimal and zygomatic e. lacrimal and maxillary
Which of the following correctly expresses the order of development?
A) Fertilization, development, maturity B) Induction, determination, differentiation C) Induction, differentiation, determination D) Fertilization, differentiation, determination E) None of these
SIV causes symptomless infections in monkeys and apes, yet causes AIDS-like disease in chimpanzees. HIV is closely related to SIV and causes AIDS in humans. Which of the following is the best explanation for these observations?
a. Monkeys, apes, and chimpanzees are all genetically very similar b. The effects of viruses on different species is random c. Chimpanzees and humans have a more recent common ancestor d. SIV is most likely lytic in apes and monkeys e. SIV is most likely latent in chimpanzees
Clusters of sphingolipids, cholesterol, and membrane proteins that move together laterally in the plane of the plasma membrane are called lipid
a. boats. b. barrels. c. rafts. d. barges.