During a microarray analysis, cDNAs made from normal cells are stained with a green fluor and
cDNAs from abnormal cells are stained with a red fluor. Which of the following statements is true
about the results of this experiment?
a. Red spots indicate genes that are underexpressed in abnormal cells.
b. Red spots indicate genes that are not expressed in abnormal cells.
c. Red spots indicate genes that are overexpressed in abnormal cells.
d. Red spots indicate genes that are overexpressed in normal cells.
e. Red spots indicate pseudogenes.
C
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All of the following are mechanisms or adaptations of organisms to the arrival of colder
winter temperatures EXCEPT
a. hibernation. b. reduction in metabolic rates. c. migration. d. growth.
According to the cohesion-tension mechanism of water transport, which of the following DOES NOT
contribute to the flow of the xylem sap?
a. hydrogen bonds between water molecules b. adhesion of water molecules to the xylem vessel walls c. evaporation of water from the leaves d. water potential in leaf cells below that of the leaf xylem e. root pressure
Which cells relay messages from photoreceptor cells to non-photoreceptor cells?
a. optic ganglion cells b. amacrine cells c. bipolar cells d. rods and cones e. horizontal cells
Sensory information is received by the ____
a. brain b. muscle c. gland d. skin e. heart