Explain the differences between receptor up-regulation and down-regulation including the conditions
under which a cell would use one rather than the other. What will be an ideal response?
Concepts to Consider: Receptor synthesis versus degradation; target cell sensitivity versus
insensitivity; the insulin receptor
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Underground stems are called __________, and they may store __________
a. taproots; starch b. taproots; toxins c. tubers; starch d. tubers; toxins
____ may have been a source of organic monomers on early Earth
a. Venus b. Meteorites c. Volcanoes d. Stromatolites e. Comets
Peptidoglycan is a compound in
a. bacterial flagella. b. bacterial cell walls. c. archaean cell walls. d. archaean flagella. e. all of these.
Which scientist described inclusive fitness as the effect an individual has on propagating its alleles through its own reproduction and through kin selection?
A. Darwin B. Hamilton C. Mendel D. Tinbergen E. Wallace