Which of the following processes in making blue jeans is incorrectly matched?
a. Blue dye - E. coli indigo
b. Cotton - fungal hyphae
c. Debleaching - bacterial enzyme
d. Plastic - bacterial PHA
e. Stone-washed - fungal enzyme
Ans: b. Cotton - fungal hyphae
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Staphylococcus aureus produces ________, leading to fibrin clots that protect them from attack by host cells
A) collagenase B) coagulase C) lipase D) amylase
Which of the following sequences correctly represents the flow of electrons during photosynthesis?
A) NADPH ? O2 ? C O2 B) H2O ? NADPH ? Calvin cycle C) NADPH ? chlorophyll ? Calvin cycle D) NADPH ? electron transport chain ? O2
Which feature is not a characteristic of the animals?
A. embryonic development B. sexual reproduction C. multicellular heterotrophs D. cell walls
A country's fertility rate suggests zero population growth, but it shows an increase of 20—30 percent over 50 years. What might account for this?
A) lower logistic growth B) a larger proportion of post-reproductive females C) better food availability D) immigration E) higher environmental resistance