Atmospheric nitrogen is
A. used directly by plants.
B. used directly by animals.
C. turned into ammonia by microorganisms.
D. directly used to make carbohydrates
C. turned into ammonia by microorganisms.
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Which of the following bacterial hosts should be used to avoid degradation of DNA that is introduced via a cloning vector?
A. Saccharomyces cerevisiae wild type cells B. RecA-expressing Escherchia coli C. Escherchia coli RecA mutants D. Escherichia coli that lack endonucleases
Which term best describes the water in a sugarwater solution?
A) product B) reactant C) solute D) solvent
If a person inherits two X chromosomes, this individual will be
A) female. B) male. C) color-blind. D) sterile. E) a poly-X female.
Why do plants dominate and define communities on land?
What will be an ideal response?