Mammalian sex determination is controlled by
A) XIST.
B) SRY.
C) XIC.
D) All of these
E) None of these
A
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The large geologic time period that includes eons that predate life on Earth and eons in which the earliest life on Earth began is the
A. Phanerozoic eon. B. Hadean eon. C. Archaean eon. D. Cenozoic era. E. Precambrian supereon.
During normal quiet exhalation, ____
a. thoracic volume increases b. the diaphragm contracts c. alveolar pressure is greater than atmospheric pressure d. the ribs are moved upward e. atmospheric pressure rises
An organism with the genotype of AaXx can produce gametes containing __________ if the two genes
are unlinked. a. either Aa or Xx b. either AX, Ax, aX, ax c. AaXx d. AX or ax e. A,a,X,x
The concentration of H+ in milk of magnesia, which has a pH of 10, is _____ times lower than that of seawater, which has a pH of 8
a. 10 b. 100 c. 2 d. 20