In what type of mating system is marked sexual dimorphism unlikely?
A. monogamy
B. polygyny
C. polygamy
D. polyandry
E. polygamy and polyandry
A. monogamy
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What might be a reasonable function of restriction endonucleases in a bacterium, distinct from their use by molecular biologists?
What will be an ideal response?
How is lac operon transcription regulated by the presence or absence of lactose?
a. When lactose is available, the repressor will bind to allolactose instead of blocking RNA polymerase. b. When lactose is not available, the repressor will bind to the promoter and block RNA polymerase from binding to the promoter. c. When lactose is not available, the repressor will bind to allolactose. d. When lactose is available, allolactose is produced and binds to the operator, blocking RNA polymerase. e. In the absence of lactose, transcription occurs at a low level resulting in the production of allolactose, which in turn stimulates the cell to take up lactose.
The ____ water mold was responsible for the Irish famine in the mid-1800s
a. Phytophthora b. Plasmodium c. E. coli d. Staphylococcus e. Trichomonas
Atoms in which the number of electrons does not equal the number of protons are known as:
A. valences. B. isomers. C. isotopes. D. ions.