Urine moves from the renal pelvis to the ________ next
A) ureter B) urethra C) uterus D) nephron
Answer: A
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Which of the following describes the function of the lacO region of the lac operon?
A. It encodes for the Lac repressor protein. B. It contains the promoter for the operon. C. Mutation of this region leads to constitutive expression of the operon. D. It encodes for the galactoside permease protein.
Mucosal antibacterial properties, a valvelike mechanism, host immune responses, and defensins are all host defense mechanisms found in the ______ tract
a. digestive b. upper respiratory c. urinary d. genital
Crocodiles are living representatives of ____
a. anapsids b. archosaurs c. lepidosaurs d. synapsids e. dinosaurs
Which of the following best describes why the polymerase chain reaction is a standard technique used in molecular biology research?
A. It uses inexpensive materials and produces perfect results B. It can purify specific section of a DNA molecule C. It can produce large amounts of specific DNA sequences D. It can duplicate the entire human genome E. It can produce large amounts of mRNA