The appearance of lungs was a(n) ____ that drove the evolution of land vertebrates

a. key innovation
b. fixed trait
c. inbred trait
d. clade
e. stabilizing allele


ANSWER: a

Biology & Microbiology

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Prokaryotic cells can undergo meiosis

Indicate whether the statement is true or false.

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Blood passing out of arterioles next enters the ____

a. capillaries b. arteries c. veins d. venules e. lymphatic vessels

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Over 99% of the water filtered through the glomerulus is reabsorbed. At which one of the following locations does most of this water reabsorption occur?

A) loop of Henle B) distal tubule C) collecting duct D) proximal tubule E) renal pelvis

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