Which of the following kinds of molecules is thought to have been absent from the primitive reducing atmosphere?
Select one:
a. water vapor (H2O)
b. methane (CH4)
c. hydrogen (H2)
d. oxygen (O2)
e. nitrogen (N2)
d. oxygen (O2)
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The mitotic stage in which the chromosomes condense, nuclei disappear, and the mitotic spindle begins to form is known as:
A. prophase. B. metaphase. C. anaphase. D. telophase. E. interphase.
Mice lacking the ability to make caspase-9 die as the result of numerous defects. During the necropsy (animal autopsy) of the animal you note that the brains of these mice are
A) unregulated growth of the nerve cells. B) lack of apoptosis of some cells. C) overstimulation of G-protein-mediated transduction. D) overproduction of the Etr1 receptor protein. E) all of the above
A SNP that changes the amino acid sequence of an encoded protein is termed
A) synonymous. B) nonsynonymous. C) transliteral. D) mutagenic.
Which of the following is an example of a conformer?
A) lizard B) rodent C) starfish D) bird