Small tubes that carry urine from the renal pelvis to the bladder are called
A. urethras.
B. the distal convoluted tubules.
C. the collecting ducts.
D. the ureters.
E. the renal corpuscles.
Answer: D. the ureters.
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Which of the following statements about tuberculosis (TB) is false?
A. MDR TB is more expensive to treat. B. Not completing a full course of antibiotic can select for MDR strains. C. HIV and TB can be transmitted in the same manner. D. The spread of TB can be very rapid. E. The reservoir of TB is humans and no vector is required for transmission.
A calcareous structure associated with sensory receptors are: a. Ampullae of Lorenzini
b. otoliths. c. neuromasts. d. maculae.
In fish, blood flows in a direction opposite to the flow of water over the gills in a process known as:
a. concurrent exchange. b. countercurrent exchange. c. crosscurrent exchange. d. exhalation. e. diffusion.
Which of the following statements about genomic DNA libraries is false?
(a) The larger the size of the fragments used to make the library, the fewer colonies you will have to examine to find a clone that hybridizes to your probe. (b) The larger the size of the fragments used to make the library, the more difficult it will be to find your gene of interest once you have identified a clone that hybridizes to your probe. (c) The larger the genome of the organism from which a library is derived, the larger the fragments inserted into the vector will tend to be. (d) The smaller the gene you are seeking, the more likely it is that the gene will be found on a single clone.