What happens to the field of view if you switch from the high-power objective to the low-power objective?
A) increases.
B) decreases.
C) remains the same.
D) cannot be determined.
Answer: A) increases.
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Which of the following nuclear RNA transport events requires the action of a guanine exchange factor (GEF)?
A. importin release of RNA in the nucleus B. exportin release of RNA in the cytoplasm C. importin binding of RNA in the cytoplasm D. exportin binding of RNA in the nucleus
E. coli is the best host for cloning because it possesses the mechanisms for processing and modifying proteins.
Answer the following statement true (T) or false (F)
The fact that birds have feathers and it is thought that some dinosaurs also had feathers is an example of _____
1.exaptation 2.stasis 3.coevolution 4.adaptive radiation
Lipids
a. yield less energy per gram than do carbohydrates. b. include cartilage and chitin. c. include fats consisting of one fatty-acid molecule and three glycerol molecules. d. are composed of monosaccharides. e. are none of these.