How many species become extinct each minute
in the rainforests alone?
a. 1.
b. 2
c. 5
d. 10
e. 20
E
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Lipopolysaccharide is comprised of three moieties (lipid A, core oligosaccharide, and O-antigen), which require ________ biosynthetic pathway(s).
A. six B. one C. two D. three
The idea that many species that once lived are now extinct due to major geologic events is called ________ and was developed by ________
a. catastrophism / Georges Cuvier b. inheritance of acquired traits / Jean-Baptiste Lamark c. principles of geology / Charles Lyell d. evolution / Charles Darwin
Recombinant DNA technology
a. uses bacteria to make copies of the desired product. b. splices DNAs together. c. is possible only between closely related species. d. uses bacteria to make copies of the desired product and splices DNAs together. e. uses bacteria to make copies of the desired product and splices DNAs together, but is possible only between closely related species.
In cell membranes cholesterol and glycoproteins are exposed to the extracellular surface for cell recognition and
adhesion to other cells. __________________ Indicate whether the statement is true or false.