The tube through which urine leaves the urinary bladder is the
a. collecting duct.
b. urethra.
c. renal pelvis.
d. ureter.
e. renal vein.
B
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Small cells function more effectively, because as cells become larger their surface area to volume ratio:
A. decreases. B. is cubed. C. increases. D. stays the same. E. is squared.
The functional units of the kidneys are the
A. neurons. B. glomerulus. C. nephrons. D. collecting ducts. E. ureters.
Addition of a poly(
A) tail to an mRNA molecule ________. A) allows the mRNA to be recognized by ribosomes during translation B) allows mRNA molecules to be more stable in the cytoplasm C) results in removal of introns D) only occurs in bacteria E) is an important step in translation
The greenhouse gas presently at highest concentration in the Earth’s atmosphere is methane. Indicate whether the statement is true or false