The Montreal Protocol:a
has not yet resulted in measurable decreases in the quantity of global warming chemicals.
b. has not yet been ratified by the U.S. Senate.
c. banned global use of CFCs by 1998.
d. was signed by all 50 states.
e. stipulated a 50% reduction in CFCs.
E
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Organisms that are prokaryotes are in the domains
A) Plantae and Animalia. B) Eukarya and Archaea. C) Archaea and Plantae. D) Fungi and Bacteria. E) Bacteria and Archaea.
________ are cytoplasmic channels through openings in plant cell walls.
Fill in the blank(s) with the appropriate word(s).
During which stage of bacterial growth (growth curve) the bacteria cells are most sensitive to antibiotic penicillin.
A. Log phase B. Lag phase C. Death phase D. Stationary phase
The ability to mount an efficient secondary antibody response depends on
A. All of the choices are correct B. Memory T and B cells C. Cross-linking of IgM antibodies D. High concentrations of IgA antibody E. Class switching to IgD production