The normal pH of body fluids is ____
a. acidic
b. always 7.0
c. slightly basic
d. in the 6.0-8.0 range
e. controlled primarily by water balance
ANSWER: c
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Hemophilia is a sex-linked, recessive genetic disorder. If a woman who was a carrier for hemophilia married a man who had the disorder, which of the following is not true?
A. Female children would have a 50% chance of being hemophiliac. B. Male children would have a 50% chance of being hemophiliac. C. All male children would be hemophiliac. D. Female children would either have the disorder or be a carrier for the disorder.
In mammals, females have two copies of the X chromosome, whereas males have only one copy. Dosage compensation is accomplished in mammals by:
A. females inactivating the X chromosome from the mother in all the cells. B. males inactivating the X chromosome from the father in all the cells. C. females expressing the X-encoded genes at 2 times the level of the male. D. males expressing the X-encoded genes at half the level of the female. E. females possessing a randomly inactivated X chromosome in all cells.
Which of the following groups of animals is most efficient at extracting oxygen from the atmosphere?
A) Reptiles B) Amphibians C) Birds D) Mammals E) Insects
How do undifferentiated cells "know" what to become?
What will be an ideal response?