Which of the following biologically important compounds is achiral?
A) 3-aminopropanoic acid
B) 2,3-dihydroxypropanoic acid
C) 3,5-dihydroxy-3-methylpentanoic acid
D) None, they are all chiral.
A
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As human populations have spread over the globe, the species extinction rate has
A. increased rapidly. B. remained equal to the species formation rate. C. decreased by about one species per year. D. decreased to historically low levels. E. remained unchanged.
Clearly explain the relationship between irrigation and salinization of soils
What will be an ideal response
What kind of metabolic rate do humans have?
A) Endothermic B) Exothermic C) Ectothermic D) None of these choices
Mass wasting events in California are often triggered by ________ in the winter, especially after areas have been damaged by wildfires.
A. heavy rainfall B. earthquakes C. road building activities D. heavy snowfall E. irrigation