In mammals, which excretory tubule segment allows water to exit but does NOT allow ions or urea to exit?
a. the ascending segment of the loop of Henle
b. the distal convoluted tubule
c. the proximal convoluted tubule
d. the descending segment of the loop of Henle
Ans: d. the descending segment of the loop of Henle
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To engulf a bacterium, a white blood cell would use ____
a. facilitated diffusion b. osmosis c. phagocytosis d. exocytosis e. sodium-potassium pumps
Compare and contrast the structure, physical characteristics, and biological functions of two of the
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Nitrogen-fixing bacteria remove nitrogen from plants and return it to the soil
Indicate whether the statement is true or false