Scientists are able to determine the location of cells expressing a certain gene in an embryo by:
a. the polymerase chain reaction.
b. blastoderm fate mapping.
c. gene mapping.
d. immunofluorescence.
e. multiple Southern blots.
D
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Imagine a planet that has a similar atmospheric pressure to Earth (760 mmHg), but different concentrations of gases in its atmosphere
On this hypothetical planet, oxygen makes up 10% of the atmosphere, nitrogen makes up 15%, and carbon dioxide makes up the remaining 75%. Based on this information, what is the partial pressure of oxygen on this new planet? A. 76 mmHg B. 114 mmHg C. 160 mmHg D. 571 mmHg E. 646 mmHg
If the histones are rearranged to control access to a gene, this is called
a. transcription. b. chromatin remodeling. c. DNA condensation. d. remodeling complex formation. e. acetylation.
Which protein classes are not found as membrane proteins?
A. identity markers B. receptors C. enzymes D. transport channels E. hormones
As you visit the high desert of southeastern Arizona, you come to a flowing stream that disappears into the sand. You notice that insects are flying up to the moist sand for a drink, but as the flow varies and waves of muddy water wash over the animals,
fine soil particles cover them and entomb them. The beginnings of what process have you just witnessed, and what might the next steps be? What will be an ideal response?