Water is ______, therefore _____ substances dissolve in it.
a. polar, nonpolar
b. polar, polar
c. nonpolar, polar
d. nonpolar, nonpolar
Answer: b. polar, polar
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Blood returning to the mammalian heart in a pulmonary vein will drain first into the
A. vena cava. B. left atrium. C. right atrium. D. left ventricle. E. right ventricle.
Answer the question using the accompanying figure. The worker bees represented by letters C and F, which receive
different alleles from the queen, are related to each other by ____.
a. 0% b. 25% c. 50% d. 75% e. 100%
In capillary exchange, ___ diffuses into the
interstitial fluid, ___ diffuses into the capillaries, and ___ stays in the capillaries.
a. oxygen; carbon dioxide; plasma proteins b. carbon dioxide; oxygen; plasma proteins c. plasma proteins; oxygen; carbon dioxide d. carbon dioxide; plasma proteins; oxygen e. oxygen; plasma proteins; carbon dioxide
Flowers bear seeds that develop from ovules housed in protective chambers called
A) stamens. B) sepals. C) ovaries. D) pistils.