Which of the following diffuses in greater amounts
from the fetal blood to the mother’s blood?
a. oxygen
b. urea
c. hormones
d. antibodies
e. nutrients
Answer: b
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The most notable difference between PrPC (normal protein) and PrPSc (prion protein) is
A. PrPC causes a cell to undergo rapid apoptosis. B. PrPC is a much longer polypeptide chain, compared to PrPSc. C. PrPc is a functional glycolytic enzyme, whereas PrPSc is nonfunctional. D. PrPc folds appropriately whereas PrPSc does not fold correctly.
A birth defect in which the spinal cord protrudes out of the vertebral column at birth is called ________
a. anencephaly b. fetal alcohol syndrome (FAS) c. spina bifida d. cleft palate
Considerable evidence indicates that the null model of community structure is incorrect because
A) each species responds independently of other species to the prevailing physical environment. B) interactions among species have no significant influence on community structure. C) when one species is removed, the populations of the other species are unaffected. D) species interactions modify the fundamental niche of the species involved, influencing their relative abundance and, in some cases, their distribution.
fatty acids not produces by the body must be consumed in the diet and are called _______ fatty acids
Fill in the blank(s) with the appropriate word(s).