Which of the following series is arranged in the correct sequence for nitrogen fixation and its subsequent use?
A. atmospheric nitrogen; use of bacterial nitrogenase; production of ammonia; conversion by plants or algae; synthesis of proteins
B. atmospheric nitrogen; use of bacterial nitrogenase; conversion by plants or algae; production of ammonia; synthesis of proteins
C. atmospheric nitrogen; production of ammonia; use of bacterial nitrogenase; conversion by plants or algae; synthesis of proteins
D. atmospheric nitrogen; production of ammonia; use of bacterial nitrogenase; synthesis of proteins; conversion by plants or algae
E. ammonia; conversion by plants and algae; production of atmospheric nitrogen; use of bacterial nitrogenase; synthesis of proteins
A. atmospheric nitrogen; use of bacterial nitrogenase; production of ammonia; conversion by plants or algae; synthesis of proteins
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Attenuation occurs in a laboratory, because
A) nonvirulent or weakly virulent mutants grow faster in vitro in laboratory media. B) pathogens lose virulence with age. C) patients are generally treated with drugs that induce attenuation. D) None of the answers are correct.
A college student spent the week hiking on the Appalachian Trail and he saw only one other hiker the entire time. Now he is walking in New York City's Time Square on a Friday night
The streets are packed with people and the skyscrapers are lit by thousands of lights. In which environment are humans having a significant impact and why? A. in New York City because the population density of humans is very high compared to other visible types of life B. in New York City because of the scarcity of the natural environment compared to manmade structures C. in both New York City and on the Appalachian Trail because the student was present in both places and thus impacted the environment D. in both New York City and on the Appalachian Trail because the large ecological footprint of humans affects the entire planet E. in both New York City and on the Appalachian Trail because at some point in history both areas have been inhabited by humans
As they emerge from the ribosome, signal sequences are recognized and bound by a
a. tRNA. b. signal peptidase. c. signal recognition particle. d. SRP receptor.
Sometimes, splitting of the pre-embryo is incomplete during the development of twins, and ________ twins result
Fill in the blank(s) with correct word