Denitrification ____.
A. converts ammonium to nitrates
B. reduces nitrates to nitrites
C. reduces ammonia to ammonium
D. converts atmospheric nitrogen to ammonia
E. converts nitrates to nitrogen gas
Answer: E
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In populations where individuals with extreme values of a trait have the highest fitness, the average value of the trait may not change, but the amount of variance in the trait does increase over time. This set of circumstances is known as ________
[two words] Fill in the blank(s) with correct word
Which of the following organisms is not capable of causing meningitis?
A) Neisseria meningitidis B) Haemophilus influenzae C) Cryptococcus neoformans D) Streptococcus pneumoniae E) None of the above
Answer the question using the accompanying figure. In the diagram of a root tip, the structure labeled "4" is the ____
a. quiescent center b. zone of cell division c. zone of elongation d. root cap e. zone of maturation
Water inside xylem is pulled upward by:
a. turgor pressure b. tension c. osmotic gradients d. pressure flow forces e. translocation