Many plants wind up with a Na+ concentration that is considerably lower than that of the surrounding soil. Which of
these plays a key role in allowing for such a difference to exist?
a. water potential
b. aquaporins
c. root cap
d. endodermis
e. tonoplast
ANSWER: d
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The main goal of sustainable development is to _____
A) involve more countries in conservation efforts B) use only natural resources in the construction of new buildings C) use natural resources such that they do not decline over time D) reevaluating and re-implementing management plans over time
The ultimate source of energy trapped during photosynthesis is
(a) CO2. (b) H2O. (c) O2. (d) sunlight.
As an H2 value approaches 0.0, which of the following must be true?
A) Almost all of the variation in phenotype is VG. B) Almost all of the variation in phenotype is VE. C) Identical (MZ) twins are virtually all discordant. D) Fraternal (DZ) twins are virtually all concordant. E) h2 = VA/VP.
What is the part of the kidney where urine is formed?
A) The nephron B) The ureter C) The liver D) The blood vessels