Among the following, which is the longest unit of geological time (i.e., the most inclusive)?
a. century
b. era
c. epoch
d. period
e. millennium
B
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A treatment for some forms of anemia is to take a drug that turns on transcription of fetal hemoglobin. This would increase the proportion of ________ globin chains.
A) alpha B) gamma C) delta D) epsilon
Identify substances that can be transferred FROM the blood TO the interstitial tissues
What will be an ideal response?
Consider a U-tube that initially contains pure water on one side of a selectively permeable membrane
and water plus solute on the other side. Which of the following best describes what will happen next? a. Solute molecules diffuse across the membrane faster than water molecules. b. The fluid level rises on the side containing the pure water. c. The diffusion of water molecules causes an osmotic pressure to build up in the tube. d. Solute molecules are transported across the membrane by facilitated diffusion. e. Some water molecules become "bound up" with solute molecules and do not diffuse freely.
The area around a nucleus where an electron is most likely to be found is the
A. orbital. B. energy level. C. polar space. D. electrical space.