Which of the following series is arranged in the correct sequence for nitrogen fixation and its subsequent use?
A. atmospheric nitrogen; production of ammonia; use of bacterial nitrogenase; synthesis of proteins; conversion by plants or algae
B. atmospheric nitrogen; use of bacterial nitrogenase; production of ammonia; conversion by plants or algae; synthesis of proteins
C. atmospheric nitrogen; production of ammonia; use of bacterial nitrogenase; conversion by plants or algae; synthesis of proteins
D. ammonia; conversion by plants and algae; production of atmospheric nitrogen; use of bacterial nitrogenase; synthesis of proteins
E. atmospheric nitrogen; use of bacterial nitrogenase; conversion by plants or algae; production of ammonia; synthesis of proteins
Answer: B
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The process during which the diploid set of chromosomes becomes haploid is:
a. mitosis b. fertilization c. cleavage d. meiosis e. gametogenesis
A fruit develops from the ovary wall
____________________ Indicate whether the statement is true or false.
What is the effect of TSST-1 exotoxin on the body?
A) It causes red blood cell lysis. B) It damages the endothelial cells of capillaries. C) It binds to receptors on T cells and activates them. D) It is a pyrogen, causing fever. E) It kills epithelial cells of mucous membranes.
Does the mimicry of California newts by the yellow-eyed salamander represent a confirmed example of co-evolution?
a. Yes, the evolution of yellow-eyed salamanders is tightly linked to changes in California newts. b. Yes, body coloration in both model and mimic is heritable. c. No, there is no evidence to date that California newts respond to evolutionary change in yel-low-eyed salamanders. d. No, yellow-eyed salamanders are only a subspecies; not the entire species to which yel-low-eyed salamanders belong is coevolving with California salamanders.