As early as the 1940s, researchers knew that bacteria could be grown in a minimal medium containing ____ as an
organic carbon source.
a. peptidase
b. glucose
c. rubisco
d. catalase
e. ammonium chloride
ANSWER: b
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How do fungi in the soil of rain forests encourage plant diversity?
A. By serving as pathogens for particular plant species, fungi encourage plant diversity. B. By serving as pollinators, fungi introduce plant diversity into new regions. C. By forming mycorrizhae with plants, fungi introduce plant diversity into new regions.
You have recently identified a molecule that you believe to be a ligand associated with a signal transduction mechanism. All you know about this ligand is that chemically it is hydrophilic. As a result, you expect it to interact with its receptor
A) at the outer cell surface. B) within the cytoplasm of the cell. C) within the nucleus of the cell. D) on the cytoplasmic side of the plasma membrane. E) all of the above
The carbon cycle is most easily studied as two interconnected subcycles
What will be an ideal response?
A small group of white-tailed deer cross the frozen water of Lake Michigan and establish a population on a remote island. This small group of deer can best be described as
A. renegades. B. a founding population. C. a newly formed species. D. a new gene pool.