Recombination frequency is used to measure the distance between genes located on nonhomologous chromosomes
A. true
B. false
B
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The normal RB gene functions as
A) an activator of transcription. B) a proto-oncogene. C) an activator of translation. D) a cell surface receptor. E) an inhibitor of transcription.
Reproductive isolation is marked by the __________ of gene flow between populations.
Fill in the blank(s) with the appropriate word(s).
Choose the TRUE statement(s) about a drug that blocks the ability of vasopressin to bind to its receptors on the collecting duct. (Select all that apply.)
a. There will be more aquaporin molecules on the apical membrane of the collecting duct. b. Urinary water output will increase. c. More water will be reabsorbed across the collecting duct. d. This drug could be very dangerous for a person deprived of water in the desert.
A C4 plant is different from a C3 plant because a C4 plant:
A) stores CO2 in four-carbon molecules before the CO2 enters the Calvin cycle. B) can leave its stomata open longer without ill effect. C) does not have bundle-sheath cells. D) performs photorespiration.