Imagine a balloon is made from a membrane that's permeable to water but not sucrose molecules. How would the balloon be affected if it is filled with a 50% sucrose solution and then placed in a beaker of water?
A) The balloon would not change in size or volume.
B) The balloon would get smaller as it loses water.
C) The balloon would get larger as it gains water.
D) The balloon would eventually burst.
C
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Which of the following molecules is a corepressor for the trp operon?
A. glucose B. cAMP C. tryptophan D. CAP E. lactose
Which phylum is a member of the Radiata clade?
a. Nemertea b. Porifera c. Rotifera d. Ctenophora e. Echinodermata
Female preference for brightly colored blue or
red males in Lake Victoria provides an example of
a. sympatric speciation. b. sexual selection. c. allopatric speciation. d. behavioral isolation. e. a combination of more than one of these.
Double fertilization occurs in
A. gymnosperms. B. mosses. C. lichens. D. angiosperms.