Rhizobium bacteria live in root nodules and
A. fix carbon dioxide so that the carbon may be used to build glucose.
B. increase the surface area, thereby increasing the water absorbing capacity of the plant's roots.
C. fix atmospheric nitrogen to NH4+ to build organic compounds.
D. All of the answer choices are correct.
Answer: C
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Which of the following BEST describes the process of nitrification?
a. N2 ? NH4 + b. NH4 + ? N2 c. N2 ? NO3 ? d. NO3 ? ? N2 e. NH4 + ? NO3
__________ are proteins that occur naturally in the
vertebrate nervous system but can cause fatal disease when they misfold. Fill in the blank(s) with the appropriate word(s).
Mammals evolved from mammal-like ____ known as therapsids more than 200 mya
a. fish b. birds c. reptiles d. arthropods e. amphibians
For the reaction Y->X at standard conditions with [Y] = 1 M and [X] = 1 M, ?G is initially a large negative number. As the reaction proceeds, [Y] decreases and [X] increases until the system reaches equilibrium
How do the values of ?G and ?G° change as the reaction equilibrates? (a) ?G becomes less negative and ?G° stays the same. (b) ?G becomes positive and ?G° becomes positive. (c) ?G stays the same and ?G° becomes less negative. (d) ?G reaches zero and ?G° becomes more negative.